Subtract 6/7 from 81/45, Solve 1 36/45

Subtract 6/7 from 81/45

1^st number: 1 36/45, 2^nd number: 6/7

81/45 - 6/7 is 33/35.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 45 × 7 = 315,
81/45 = 81 × 7/45 × 7 = 567/315
Likewise, for the 2nd fraction, since 7 × 45 = 315,
6/7 = 6 × 45/7 × 45 = 270/315
Subtract the two like fractions:
567/315 - 270/315 = 567 - 270/315 = 297/315
After reducing the fraction, the answer is 33/35

MathStep (Works offline)

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