Subtract 63/20 from 21/5
1st number: 4 1/5, 2nd number: 3 3/20
21/5 - 63/20 is 21/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 5 × 4 = 20,
21/5 = 21 × 4/5 × 4 = 84/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
63/20 = 63 × 1/20 × 1 = 63/20 - Subtract the two like fractions:
84/20 - 63/20 = 84 - 63/20 = 21/20 - In mixed form: 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5-63/20 21/10-63/20 21/5-63/40 63/5-63/20 21/15-63/20 21/5-63/60 21/25-63/20 21/35-63/20