Question

An electrician bought 120 feet of electrical wire and used 105 feet of it

What percent of the wire went unused?
A 15%
B 12.5%
C 8.75%
D 7%

Answer 1

B. 12.5%

Explanation:

Find how much was unused:

120 - 105

= 15

To find what percent this is, divide it by 120:

15/120

= 0.125

Multiply this by 100:

0.125(100)

= 12.5

So, 12.5% of the wire went unused

The correct answer is B. 12.5%