Subtract 21/80 from 56/42
1st number: 1 14/42, 2nd number: 21/80
56/42 - 21/80 is 257/240.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
56/42 = 56 × 40/42 × 40 = 2240/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
21/80 = 21 × 21/80 × 21 = 441/1680 - Subtract the two like fractions:
2240/1680 - 441/1680 = 2240 - 441/1680 = 1799/1680 - After reducing the fraction, the answer is 257/240
- In mixed form: 117/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/42-42/80 56/84-21/80 56/42-63/80