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Glencoe Math: Course 2, Volume 1 View details

Mid-Chapter Check

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Exercise 4 Page 140

Start by rounding 392. Then multiply 20 % by the rounded number.

About 80

Practice makes perfect

We want to estimate 20 % of 392. Let's start by rounding 392. rcl 392 & ≈ & 400 Now we multiply 20 % by 400 to get an estimation. First, we write the percent as a fraction.

20 %* 400

▼

Write the percent as a fraction

WriteAsFrac

Write as a fraction

20/100 * 400

ReduceFrac

a/b=.a /20./.b /20.

20÷ 20/100÷ 20 * 400

CalcQuot

Calculate quotient

1/5 * 400