Question

Suppose that 13 inches of wire costs 52 cents.

At the same rate, how many inches of wire can be bought for 36 cents?

Answer 1

9 inches

Explanation:

Set it up like a fraction ratio and solve for x. as the price (denominator) and amount (numerator) have a set ratio, you can cross-multiply for your answer.

`(13)/(52) =(x)/(36\\)\\`

13*36 = 468

468/52 = 9

Another way would be to divide 13 by 52 and multiply by 36, but then you end up with decimals and cross multiplication will be easier in the long run.