Subtract 42/27 from 27/15
1st number: 1 12/15, 2nd number: 1 15/27
27/15 - 42/27 is 11/45.
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,
27/15 = 27 × 9/15 × 9 = 243/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
42/27 = 42 × 5/27 × 5 = 210/135 - Subtract the two like fractions:
243/135 - 210/135 = 243 - 210/135 = 33/135 - After reducing the fraction, the answer is 11/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/15-42/27 27/15-84/27 27/30-42/27 27/15-42/54 81/15-42/27 27/45-42/27 27/15-42/81 27/75-42/27