Problem 6 · 2016 Math Kangaroo
Easy
Fractions, Decimals & Percents
percent-multipliertotal-then-divide
At Anna’s school 45 teachers come to school by bike, and that is 60% of all the teachers. Only 12% of the teachers come to school by car. How many teachers come to school by car?
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Answer: C — 9
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Hint 1 of 2
First find the total number of teachers from the 60% fact.
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Hint 2 of 2
Then take 12% of that total.
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Approach: find the whole, then a percent of it
- 45 teachers are 60% of all teachers, so the total is 45 ÷ 0.60 = 75 teachers.
- 12% of 75 is 0.12 × 75 = 9 teachers come by car.
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