Subtract 8/7 from 70/9
1st number: 7 7/9, 2nd number: 1 1/7
70/9 - 8/7 is 418/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
70/9 = 70 × 7/9 × 7 = 490/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
8/7 = 8 × 9/7 × 9 = 72/63 - Subtract the two like fractions:
490/63 - 72/63 = 490 - 72/63 = 418/63 - In mixed form: 640/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/9-16/7 70/18-8/7 70/9-8/14 70/9-24/7 70/27-8/7 70/9-8/21 70/9-40/7 70/45-8/7 70/9-8/35 70/9-56/7 70/63-8/7 70/9-8/49