Subtract 54/72 from 25/7, Solve 3 4/7

Subtract 54/72 from 25/7

1^st number: 3 4/7, 2^nd number: 54/72

25/7 - 54/72 is 79/28.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 72 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 7 × 72 = 504,
25/7 = 25 × 72/7 × 72 = 1800/504
Likewise, for the 2nd fraction, since 72 × 7 = 504,
54/72 = 54 × 7/72 × 7 = 378/504
Subtract the two like fractions:
1800/504 - 378/504 = 1800 - 378/504 = 1422/504
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