Subtract 70/9 from 56/21
1st number: 2 14/21, 2nd number: 7 7/9
56/21 - 70/9 is -46/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
56/21 = 56 × 3/21 × 3 = 168/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
70/9 = 70 × 7/9 × 7 = 490/63 - Subtract the two like fractions:
168/63 - 490/63 = 168 - 490/63 = -322/63 - After reducing the fraction, the answer is -46/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/42-70/9 56/21-70/18 56/63-70/9 56/21-70/27 56/21-70/45 56/21-70/63