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Frequency tables and percent bars

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hey guys it's like deja vu and my kids screaming in the background OK Google data example favorite music then when you ask people about their favorite music and they answer then you put I'm telling mark down and then when you find the percent of each category is called a relative frequency table now we're going to be in a lot of part to whole today so that whoever this was asked the kids what elective they were going to you got debate drama and badminton now step number of students the most important thing right here forever is finding the total for the whole Steven Adams 90161 50 and you get 300 this is so very important. This is your key right here now you're going to take 300 you're going to use that hole for each part to whole ratio that you're going to make for each of these he's right here I'm going to do a part to whole for debate debate as the part 300 will be the hole so then that's going to be 90 out of 300 and we want the percent and a percent is out of 100 then we're going to take this you could do cross multiply divide if you wanted to but in this case it's easier to find that sideways or his relationship 300 to 100 is divided by 31090 divided by 2 it's going to be 30 20 numbers out of 100 is considered a percent so 30% of those kids shows debate as an elective for drama you're going to do Parts out of hole a 300 again see you again when I turn it into a percent percent means X over 100 you could cross multiply you could look up and down till this time easiest is fine razors 300 divided by 3 equals 160 divided by 3.321 100 considered a once it's out of 100 it's considered a percent not going to redo that cuz I only have one copy of this what song is this song okay now. I got 150 of the part heart to home my part is badminton which is 150 my whole of the table is still 300 total students at you want to turn it into a percent again at 6 / 100 easiest relationships / 3 to get to 100 from 350 / 3 on the bottom you're going to do it on the top and that's going to give you 50 once it's a number out of 100 and gets to be called 2% so it's 50% you have done this before with this is not a big deal now you're going to make a little percent bar Mich I have do it okay so now all we're going to do is work how to take view three percentage that add up to 100% and we're going to add them on to this for some bar so the first one we have this debate. 30% I'm going to go from 0 to 30 30 on top then we took the bait in here and then I'm going to put a collar on there cuz I'm doing Waco you're going to decide it's okay, I don't have another beginning at 0 so what I have to do if I have to add that 20% this 30th already here so 30 + 25/2 + 30 + 20 that's going to give me 50 so from 30% to 50% it's going to be considered that 24 right there and then just my drama now I'm going to add the last part of this the badminton so I got 50 up here so I'm 50 I'm at another 50% which is going to take me all the way to the end of my percent by razor badminton and it's 50% I think I do no what percent of students chose to be so just what percent of students dress debate 30% what percent shows drama 20% what percent shows Batman 50% these questions down here or just proving that you know how to read your data up here if 300 students were surveyed then how those drama when we out of this to go right here 300 were surveyed and how many chose drama 60 and it just says how many students does it say what percent do you just put 62 digits the nuts 100-300 were surveyed how many chose badminton again and just as how many students it doesn't a percent and it's out of 300 and we already have a total of 300 right here so that's going to be an answer of 150 students okay so produced by the first need to do is find your total all of these people all together we're at about their favorite pizza stop and get a total your home and then I want you to make your proportions here make your part to whole ratio and then put your percent proportion on the next to it okay so once you have these setup you always have the option of cross multiply and divide but you shouldn't rely on that I'm going to go through and I'm going to show you the way to do it where you simplify down to multiply up but it is your choice it's more important to know how to do the ones on the other side I don't think you're going to get nasty numbers like this but if you did you can always cross multiply divide at least try to ratio you can for a 110 / 240 but that's a whole lot of me you need to look for relationships by Blazers or up and down and I think I might have one going up and down right here if I go from 2:40 to or if I can drop those zeros and I go from 24 to 6:24 divided by 4 is 6 is that means that 240 / 4 is 60 so if dividing by 4 work on this side image over here 100 divided by 4 is 25 so that percentage for cheese is 25% and you try now. I'm going to act like I only know about dividing by two okay. 132 / 240 now I'm going to divide both of these by 2 and I'm going to go to bed by 2 when I do that I'm going to get 66 / 120 that's so not an easy relationship back to 100 okay so whatever am I going to do 2 / 2 when I do I'm now going to 33 / 60 2062 100 still not an easy relationship right there so now I add this by 2 but I can if I've ever goes by 3 so if I divide both of these by 3 innocent 11 on top and this will be 20 on the bottom now look at this shaking from 20 to 100 that's going to be * 5 and then 11 to X 3 * 5 is well from time to 5 55% or 55 and then 55 out of 100 means that pepperoni what's the 55% afferent a little over half have you tried and remember I don't think they're going to be this bad now hamburger right here. 3602 40 equals x over a hundred I got to turn that into a percent again not an easy relationship by the way there is not an easy release I can't remember a ratio for 10 and / 12 when I do 36 divided by 12 is 3 and 240 / 12 is 20 the reason for that is 24 / 12 to 2:40 / 12:20 now I have an easy relationship from 20/20 which would be x 5 if I'm about 5 times 5 on the bottom mold find x 5 on the top and I get 15 amp 100 which means 15% of the people surveyed chose hamburger as their favorite here's your last one out of this beauty before we put it on that percent bar not an easy relationship if I go from 24 to 12 that's dividing by 2 so if I go from 240 to 12 and then I can do 100 divided by 20 and then that gives me five so none of the people surveyed only 5 4 tell Becky about their favorite G okay so now we're going to take these percentages right here and we're combine them on to this one 100% percent bar so 25% is where we start and that's four cheese so 25% 25% rental talk 55% so I'm going to have to combine 25 and 55 so that I know where this needs to stop cuz it's not starting over at 0 right here it's actually starting at 25 so when I add 25 + 55 + 280 here's pepperoni now I add 15% to 55% night gets me 295 for hamburger veggie people are down here on the end 2 mi 100 okay answer my question over 50% so that's about 50% of the sixth graders chose cheese pizza 6% of the sixth graders just veggie not pepperoni and veggie pizza with pepperoni number is 55 is 5% and and or add under or you add 55 plus 5% gives you 60% less than 60 60% it 60% maybe probably is a good role model for all of the people in New Jersey thank you

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3/31 Lesson

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