Subtract 63/20 from 21/35
1st number: 21/35, 2nd number: 3 3/20
21/35 - 63/20 is -51/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 35 × 4 = 140,
21/35 = 21 × 4/35 × 4 = 84/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
63/20 = 63 × 7/20 × 7 = 441/140 - Subtract the two like fractions:
84/140 - 441/140 = 84 - 441/140 = -357/140 - After reducing the fraction, the answer is -51/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/35-63/20 21/70-63/20 21/35-63/40 63/35-63/20 21/35-63/60