Subtract 42/56 from 25/7, Solve 3 4/7

Subtract 42/56 from 25/7

1^st number: 3 4/7, 2^nd number: 42/56

25/7 - 42/56 is 79/28.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 56 is 56

Next, find the equivalent fraction of both fractional numbers with denominator 56
For the 1st fraction, since 7 × 8 = 56,
25/7 = 25 × 8/7 × 8 = 200/56
Likewise, for the 2nd fraction, since 56 × 1 = 56,
42/56 = 42 × 1/56 × 1 = 42/56
Subtract the two like fractions:
200/56 - 42/56 = 200 - 42/56 = 158/56
After reducing the fraction, the answer is 79/28
In mixed form: 223/28

MathStep (Works offline)

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