Subtract 10/7 from 81/9, Solve 9 0/9

Subtract 10/7 from 81/9

1^st number: 9 0/9, 2^nd number: 1 3/7

81/9 - 10/7 is 53/7.

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,
81/9 = 81 × 7/9 × 7 = 567/63
Likewise, for the 2nd fraction, since 7 × 9 = 63,
10/7 = 10 × 9/7 × 9 = 90/63
Subtract the two like fractions:
567/63 - 90/63 = 567 - 90/63 = 477/63
After reducing the fraction, the answer is 53/7
In mixed form: 74/7

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad