Question

Kevin was watching a DVD that was 125 minutes long. A friend called and he talked to his friend for 15 minutes while the DVD was playing. What percent of the length time of the DVD did he spend talking to his friend on the phone?

Answer 1

125 : 100 = 25 : x
x = 100 * 25 : 125
x = 2500 : 125
x = 20


20%