Subtract 90/27 from 72/15
1st number: 4 12/15, 2nd number: 3 9/27
72/15 - 90/27 is 22/15.
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,
90/27 = 90 × 5/27 × 5 = 450/135 - Subtract the two like fractions:
648/135 - 450/135 = 648 - 450/135 = 198/135 - After reducing the fraction, the answer is 22/15
- In mixed form: 17/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/30-90/27 72/15-90/54 72/45-90/27 72/15-90/81 72/75-90/27