Subtract 54/72 from 18/15
1st number: 1 3/15, 2nd number: 54/72
18/15 - 54/72 is 9/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 15 × 24 = 360,
18/15 = 18 × 24/15 × 24 = 432/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
54/72 = 54 × 5/72 × 5 = 270/360 - Subtract the two like fractions:
432/360 - 270/360 = 432 - 270/360 = 162/360 - After reducing the fraction, the answer is 9/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15-54/72 18/30-54/72 54/15-54/72 18/45-54/72 90/15-54/72 18/75-54/72