Subtract 80/9 from 70/7
1st number: 10 0/7, 2nd number: 8 8/9
70/7 - 80/9 is 10/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
70/7 = 70 × 9/7 × 9 = 630/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
80/9 = 80 × 7/9 × 7 = 560/63 - Subtract the two like fractions:
630/63 - 560/63 = 630 - 560/63 = 70/63 - After reducing the fraction, the answer is 10/9
- In mixed form: 11/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/14-80/9 70/7-80/18 70/21-80/9 70/7-80/27 70/35-80/9 70/7-80/45 70/49-80/9 70/7-80/63