Subtract 54/72 from 15/50
15/50 - 54/72 is -9/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 72 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 50 × 36 = 1800,
15/50 = 15 × 36/50 × 36 = 540/1800 - Likewise, for the 2nd fraction, since 72 × 25 = 1800,
54/72 = 54 × 25/72 × 25 = 1350/1800 - Subtract the two like fractions:
540/1800 - 1350/1800 = 540 - 1350/1800 = -810/1800 - 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: 30/50-54/72 45/50-54/72 75/50-54/72