### Home > ACC6 > Chapter 7 Unit 7 > Lesson CC1: 7.3.1 > Problem7-88

7-88.

On graph paper, draw a rectangle with a width of $5$ units and a length of $7$ units.

1. Draw a new rectangle that is an enlarged copy of your original rectangle and has a length of $13$ units.

Notice that the side $7$ units long corresponds to the side $13$ units long.

2. Show how you can calculate the width of your new rectangle.

• What number did you multiply $7$ units by to get $13$ units?
Use this same multiplier to calculate the new enlarged width.

• $\frac{13}{7}\approx\ 1.86$

Use $1.86$ to find the new width of the rectangle.

$5(1.86) = 9.3 \text{ units}$

Use the eTool below to help you better understand how scale factors work.
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