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Glencoe Math: Course 2, Volume 1 View details

2. Percent and Estimation

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Exercise 5 Page 115

Round each number and multiply.

About 168

Practice makes perfect

We want to estimate 72 % of 238. Let's start by rounding each number. rcl 72 % & ≈ & 70 % [0.3em] 238 & ≈ & 240 Now we multiply 70 % by 240 to get an estimation. First, we write the percent as a fraction.

70 %* 240

▼

Write the percent as a fraction

WriteAsFrac

Write as a fraction

70/100 * 240

ReduceFrac

a/b=.a /10./.b /10.

70÷ 10/100÷ 10 * 240

CalcQuot

Calculate quotient

7/10 * 240