Subtract 5/7 from 21/35
21/35 - 5/7 is -4/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 7 is 35
Next, find the equivalent fraction of both fractional numbers with denominator 35 - For the 1st fraction, since 35 × 1 = 35,
21/35 = 21 × 1/35 × 1 = 21/35 - Likewise, for the 2nd fraction, since 7 × 5 = 35,
5/7 = 5 × 5/7 × 5 = 25/35 - Subtract the two like fractions:
21/35 - 25/35 = 21 - 25/35 = -4/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/35-5/7 21/35-10/7 21/70-5/7 21/35-5/14 63/35-5/7 21/35-15/7 21/35-5/21 21/35-25/7 21/35-5/35 21/35-35/7 21/35-5/49