Subtract 21/7 from 35/28
1st number: 1 7/28, 2nd number: 3 0/7
35/28 - 21/7 is -7/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 28 × 1 = 28,
35/28 = 35 × 1/28 × 1 = 35/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
21/7 = 21 × 4/7 × 4 = 84/28 - Subtract the two like fractions:
35/28 - 84/28 = 35 - 84/28 = -49/28 - After reducing the fraction, the answer is -7/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/28-21/7 35/28-42/7 35/56-21/7 35/28-21/14 35/28-63/7 35/84-21/7 35/28-21/35 35/28-21/49