Subtract 8/9 from 81/15
1st number: 5 6/15, 2nd number: 8/9
81/15 - 8/9 is 203/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
81/15 = 81 × 3/15 × 3 = 243/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
8/9 = 8 × 5/9 × 5 = 40/45 - Subtract the two like fractions:
243/45 - 40/45 = 243 - 40/45 = 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: 81/15-16/9 81/30-8/9 81/15-8/18 81/15-24/9 81/45-8/9 81/15-8/27 81/15-40/9 81/75-8/9 81/15-8/45 81/15-56/9 81/15-8/63