Explanation for Question 23 From the Math (Calc) Section on the 2017 May Sat
So we did question 22 in the previous video. 2 That's a good question. 23 question 23 says which of the following is closest 3 to the percentage of total number of units of products, 4 P and Q combined that are made at factory Z annually. 5 So when we talk about percentage, so a couple ways to look at it, 6 but I liked the method part overhaul. 7 So part of our whole is a good way to, 8 um, determine what percent of something you have part being, 9 what they're asking for and whole being the total value. 10 So in this case, they want to know what is the closer percentages of 11 total number of units produce units of product P and Q 12 that are made of factory Z over all of the products made. 13 So the parts is a products BNQ made at factory Z 14 and the whole is all of the products made. 15 So remember, this is your calculator section, 16 so you can use your calculator here. 17 And like we said to the part or the products being Q produced at 18 factory C is 32 plus 24. 19 So it's this one. And this one it's going to be 56 and 20 then the whole is everything. 21 So we're going to be adding 32 plus 24 plus 22 21 plus 14. That gives us 91, 23 not defined a percentage. We can first divide that it's calculator section. 24 So we just do 56 divided by 91 and we get 0.6 25 1 5, 3 8. 26 So on, but remember this is a decimal. 27 We want an in percentage form to change a decimal into percentage. 28 All we do is multiply times a 100 to multiply by 100. 29 What we're doing is we move the decimal twice. 30 So we have 61. Um, 31 I just moved it three times. We move it twice or we have 32 one here and one here, the decimal is between the one and the five. 33 You have 61.5. 34 We can just run down to five, which is closest to 62.