Grade 6 FAST Mathematics Practice Test

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If 40% of a number is 20, what is the number?

25

50

Think of percent as a way of saying part of a whole. If 40% of a number is 20, you’re saying 0.4 times the number equals 20. To find the whole, divide by 0.4: 20 ÷ 0.4 = 50. So the number is 50. Check: 0.4 × 50 = 20. For the other options, 40% of 25 is 10, 40% of 80 is 32, and 40% of 40 is 16, none of which give 20.

80

40

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