Subtract 8/72 from 4/80
4/80 - 8/72 is -11/180.
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,
4/80 = 4 × 9/80 × 9 = 36/720 - Likewise, for the 2nd fraction, since 72 × 10 = 720,
8/72 = 8 × 10/72 × 10 = 80/720 - Subtract the two like fractions:
36/720 - 80/720 = 36 - 80/720 = -44/720 - After reducing the fraction, the answer is -11/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/80-8/72 4/80-16/72 12/80-8/72 4/80-24/72 20/80-8/72 4/80-40/72 28/80-8/72 4/80-56/72