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Glencoe Math: Course 2, Volume 1 View details

2. Percent and Estimation

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Exercise 25 Page 117

Round each number and multiply.

About 0.7

Practice makes perfect

We want to estimate 0.9 % of 74. Let's start by rounding each number. rcl 0.9 % & ≈ & 1 % [0.3em] 74 & ≈ & 70 Now we multiply 1 % by 70 to get an estimation. First, we write the percent as a fraction.

1 %* 70

WriteAsFrac

Write as a fraction

1/100 * 70

MoveRightFacToNumOne

1/b* a = a/b

70/100

CalcQuot

Calculate quotient

0.7

We found that 0.9 % of 74 is about 0.7.