Subtract 42/27 from 72/15
1st number: 4 12/15, 2nd number: 1 15/27
72/15 - 42/27 is 146/45.
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,
72/15 = 72 × 9/15 × 9 = 648/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
42/27 = 42 × 5/27 × 5 = 210/135 - Subtract the two like fractions:
648/135 - 210/135 = 648 - 210/135 = 438/135 - After reducing the fraction, the answer is 146/45
- In mixed form: 311/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/15-84/27 72/30-42/27 72/15-42/54 72/45-42/27 72/15-42/81 72/75-42/27