Subtract 63/42 from 32/21
1st number: 1 11/21, 2nd number: 1 21/42
32/21 - 63/42 is 1/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
32/21 = 32 × 2/21 × 2 = 64/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
63/42 = 63 × 1/42 × 1 = 63/42 - Subtract the two like fractions:
64/42 - 63/42 = 64 - 63/42 = 1/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 64/21-63/42 32/42-63/42 32/21-63/84 96/21-63/42 32/63-63/42