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Glencoe Math: Course 2, Volume 1

GM

Glencoe Math: Course 2, Volume 1 View details

1. Percent of a Number

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Exercise 1 Page 106

To write the percent as a fraction, write the number part as a numerator over $100 .$

$4$

Practice makes perfect

We are asked to calculate

8 %

of

50 .

Let's do this by writing the percent as a fraction and then multiplying it by

50 .

Recall that we can write the percent as a fraction by writing the number part as a numerator over

100 .

8 % = \frac{8}{1 0 0}

Notice that we can also reduce the fraction that we got.

\frac{8}{1 0 0}

$\frac{a}{b} = \frac{a / 4}{b / 4}$

\frac{8 / 4}{1 0 0 / 4}

Calculate quotient

\frac{2}{2 5}

Now we will find

\frac{2}{2 5}

of

50 .

\frac{2}{2 5} of 50 = \frac{2}{2 5} \times 50

To do so, we can write

50

as

\frac{5 0}{1}

and perform the multiplication. Let's do it!

\frac{2}{2 5} \times 50

$a = \frac{a}{1}$

\frac{2}{2 5} \times \frac{5 0}{1}

Multiply fractions

\frac{2 \times 5 0}{2 5 \times 1}

Multiply

\frac{1 0 0}{2 5 \times 1}

Identity Property of Multiplication

\frac{1 0 0}{2 5}

Calculate quotient

4

We got that

8 %

of

50

is equal to

4 .

Subchapter links

Guided Practice p.106

Independent Practice p.107-108

H.O.T. Problems p.108

Standardized Test Practice p.108-110

Extra Practice p.109

Common Core Review p.110