Subtract 35/56 from 72/21
1st number: 3 9/21, 2nd number: 35/56
72/21 - 35/56 is 157/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
72/21 = 72 × 8/21 × 8 = 576/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
35/56 = 35 × 3/56 × 3 = 105/168 - Subtract the two like fractions:
576/168 - 105/168 = 576 - 105/168 = 471/168 - After reducing the fraction, the answer is 157/56
- In mixed form: 245/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/21-70/56 72/42-35/56 72/63-35/56