Subtract 21/56 from 7/2
1st number: 3 1/2, 2nd number: 21/56
7/2 - 21/56 is 25/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 56 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 2 × 28 = 56,
7/2 = 7 × 28/2 × 28 = 196/56 - Likewise, for the 2nd fraction, since 56 × 1 = 56,
21/56 = 21 × 1/56 × 1 = 21/56 - Subtract the two like fractions:
196/56 - 21/56 = 196 - 21/56 = 175/56 - After reducing the fraction, the answer is 25/8
- In mixed form: 31/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/2-21/56 7/2-42/56 7/4-21/56 21/2-21/56 7/2-63/56 7/6-21/56 35/2-21/56 7/10-21/56 49/2-21/56 7/14-21/56