Subtract 3/72 from 1/80
1/80 - 3/72 is -7/240.
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,
1/80 = 1 × 9/80 × 9 = 9/720 - Likewise, for the 2nd fraction, since 72 × 10 = 720,
3/72 = 3 × 10/72 × 10 = 30/720 - Subtract the two like fractions:
9/720 - 30/720 = 9 - 30/720 = -21/720 - After reducing the fraction, the answer is -7/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/80-3/72 1/80-6/72 3/80-3/72 1/80-9/72 5/80-3/72 1/80-15/72 7/80-3/72 1/80-21/72