Subtract 42/27 from 81/15
1st number: 5 6/15, 2nd number: 1 15/27
81/15 - 42/27 is 173/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 27 is 135
Next, find the equivalent fraction of both fractional numbers with denominator 135 - For the 1st fraction, since 15 × 9 = 135,
81/15 = 81 × 9/15 × 9 = 729/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
42/27 = 42 × 5/27 × 5 = 210/135 - Subtract the two like fractions:
729/135 - 210/135 = 729 - 210/135 = 519/135 - After reducing the fraction, the answer is 173/45
- In mixed form: 338/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/15-84/27 81/30-42/27 81/15-42/54 81/45-42/27 81/15-42/81 81/75-42/27