Subtract 15/72 from 10/80
10/80 - 15/72 is -1/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 72 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
10/80 = 10 × 9/80 × 9 = 90/720 - Likewise, for the 2nd fraction, since 72 × 10 = 720,
15/72 = 15 × 10/72 × 10 = 150/720 - Subtract the two like fractions:
90/720 - 150/720 = 90 - 150/720 = -60/720 - After reducing the fraction, the answer is -1/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/80-15/72 10/80-30/72 30/80-15/72 10/80-45/72 50/80-15/72 10/80-75/72 70/80-15/72