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Glencoe Math: Course 2, Volume 1 View details

2. Percent and Estimation

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Exercise 8 Page 115

Round each number and multiply.

About 1.7

Practice makes perfect

We want to estimate 34 % of 168. Let's start by rounding each number. rcl 3/4 % & ≈ & 1 % [0.9em] 168 & ≈ & 170 Now we multiply 1 % by 170 to get an estimation. First, we write the percent as a fraction.

1 %* 170

WriteAsFrac

Write as a fraction

1/100 * 170

MoveRightFacToNumOne

1/b* a = a/b

170/100

CalcQuot

Calculate quotient

1.7

We found that 34 % of 168 is about 1.7.