Subtract 21/70 from 4/35
4/35 - 21/70 is -13/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 35 × 2 = 70,
4/35 = 4 × 2/35 × 2 = 8/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
21/70 = 21 × 1/70 × 1 = 21/70 - Subtract the two like fractions:
8/70 - 21/70 = 8 - 21/70 = -13/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/35-21/70 4/35-42/70 4/70-21/70 12/35-21/70 4/35-63/70 20/35-21/70 28/35-21/70