Subtract 3/42 from 56/21
1st number: 2 14/21, 2nd number: 3/42
56/21 - 3/42 is 109/42.
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,
56/21 = 56 × 2/21 × 2 = 112/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
3/42 = 3 × 1/42 × 1 = 3/42 - Subtract the two like fractions:
112/42 - 3/42 = 112 - 3/42 = 109/42 - In mixed form: 225/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21-6/42 56/42-3/42 56/21-3/84 56/21-9/42 56/63-3/42 56/21-15/42 56/21-21/42