Subtract 9/7 from 15/25, Solve 15/25

Subtract 9/7 from 15/25

1^st number: 15/25, 2^nd number: 1 2/7

15/25 - 9/7 is -24/35.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 7 is 175

Next, find the equivalent fraction of both fractional numbers with denominator 175
For the 1st fraction, since 25 × 7 = 175,
15/25 = 15 × 7/25 × 7 = 105/175
Likewise, for the 2nd fraction, since 7 × 25 = 175,
9/7 = 9 × 25/7 × 25 = 225/175
Subtract the two like fractions:
105/175 - 225/175 = 105 - 225/175 = -120/175
After reducing the fraction, the answer is -24/35

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad