Subtract 21/7 from 49/25, Solve 1 24/25

Subtract 21/7 from 49/25

1^st number: 1 24/25, 2^nd number: 3 0/7

49/25 - 21/7 is -26/25.

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,
49/25 = 49 × 7/25 × 7 = 343/175
Likewise, for the 2nd fraction, since 7 × 25 = 175,
21/7 = 21 × 25/7 × 25 = 525/175
Subtract the two like fractions:
343/175 - 525/175 = 343 - 525/175 = -182/175
After reducing the fraction, the answer is -26/25

MathStep (Works offline)

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