Explanation for Question 32 From the Math (Calc) Section on the 2017 May Sat
I shouldn't 32 says last year, 2 Gary's tomato plants produce 24 kilograms of potatoes, 3 tomatoes. You're going to circle that because that's important. 4 This year, Gary increased the number of tomato plants in his garden by 25%. 5 If his plants produced tomatoes this year at the same rate per plant as 6 last year, how many kilograms of tomatoes can Gary expect the plans to produce 7 this year? So if they're producing at the same rate and we're increasing the 8 plants by 25%, we're going to have 25% more 9 also of tomatoes produced. 10 So if 24 kilograms were produced last year, 11 25% of 24, 12 we just multiply 24 by 25%. 13 We have to change the percentage into a decimal. 14 So if we have 25%, 15 we move our decimal point twice. 16 That's just 0.2, five. So we a 24 times 0.25, 17 you can use your calculator, um, 18 to figure out the 24 times 0.25 is six. 19 So six is the additional, 20 um, kilograms of tomatoes that Gary's plants produced. 21 So if there's six additional ones, 22 we had 24. Originally we do six plus 24 equals 23 30, 30 kilograms of tomatoes. 24 Um, another way that you could also write that so that you don't have 25 to end up adding six plus 24 is you can do 24 times 26 one plus 0.25. 27 It's the same way. Whether you set it up like this, 28 or just like this, if you have it in the second format, 29 once you distribute it, you already, 30 um, kind of account for that 25 that you had in the beginning by 31 the one. Cause when you distribute it, you have 24 plus 24 32 times 0.25, which is then just 24 plus six, 33 which is 30. So it's the same way. 34 It's just, if you like to look at it, um, 35 like the first way or the second way, 36 it's still 30 kilograms.