Subtract 10/56 from 21/7
1st number: 3 0/7, 2nd number: 10/56
21/7 - 10/56 is 79/28.
Steps for subtracting fractions
- 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,
21/7 = 21 × 8/7 × 8 = 168/56 - Likewise, for the 2nd fraction, since 56 × 1 = 56,
10/56 = 10 × 1/56 × 1 = 10/56 - Subtract the two like fractions:
168/56 - 10/56 = 168 - 10/56 = 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
Related: 42/7-10/56 21/7-20/56 21/14-10/56 63/7-10/56 21/7-30/56 21/7-50/56 21/35-10/56 21/7-70/56 21/49-10/56