Question

Solve using equivalent ratios.

5. Wayne has a recipe on a 3-inch-by-5-inch index card that he wants to
enlarge to 15 inches long. How wide will the enlargement be?

Answer 1

The width of the new card is 9 inches.

SOLUTION:

Given, we have to solve using equivalent ratios. Wayne has a recipe on a 3-inch-by-5-inch index card that he wants to enlarge to 15 inches long.

We have to find width of the enlargement

Now, dimensions of card is
`\bold{\frac{(3 \text { inch })}{(5 \text { inch })}}`

Let the new width of card be n inches .

So, New dimensions of card is
`\bold{\frac{(n \text { inch })}{(15 \text { inch })}}`

Then, equivalent ratio is
`\bold{(3)/(5)=(n)/(15)}`

`\bold{(3)/(5)=(n)/(15) \rightarrow n=(3)/(5) * 15 \rightarrow n=3 * 3 \rightarrow n=9}`