Subtract 81/45 from 2/15
1st number: 2/15, 2nd number: 1 36/45
2/15 - 81/45 is -5/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
2/15 = 2 × 3/15 × 3 = 6/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
81/45 = 81 × 1/45 × 1 = 81/45 - Subtract the two like fractions:
6/45 - 81/45 = 6 - 81/45 = -75/45 - After reducing the fraction, the answer is -5/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/15-81/45 2/30-81/45 2/15-81/90 6/15-81/45 2/45-81/45 10/15-81/45 2/75-81/45 14/15-81/45