Subtract 16/18 from 81/15
1st number: 5 6/15, 2nd number: 16/18
81/15 - 16/18 is 203/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
81/15 = 81 × 6/15 × 6 = 486/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
16/18 = 16 × 5/18 × 5 = 80/90 - Subtract the two like fractions:
486/90 - 80/90 = 486 - 80/90 = 406/90 - After reducing the fraction, the answer is 203/45
- In mixed form: 423/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/15-32/18 81/30-16/18 81/15-16/36 81/15-48/18 81/45-16/18 81/15-16/54 81/15-80/18 81/75-16/18 81/15-16/90