Subtract 72/27 from 18/15
1st number: 1 3/15, 2nd number: 2 18/27
18/15 - 72/27 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,
18/15 = 18 × 9/15 × 9 = 162/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
72/27 = 72 × 5/27 × 5 = 360/135 - Subtract the two like fractions:
162/135 - 360/135 = 162 - 360/135 = -198/135 - After reducing the fraction, the answer is -22/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15-72/27 18/30-72/27 18/15-72/54 54/15-72/27 18/45-72/27 18/15-72/81 90/15-72/27 18/75-72/27