Subtract 7/36 from 81/80
1st number: 1 1/80, 2nd number: 7/36
81/80 - 7/36 is 589/720.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 36 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
81/80 = 81 × 9/80 × 9 = 729/720 - Likewise, for the 2nd fraction, since 36 × 20 = 720,
7/36 = 7 × 20/36 × 20 = 140/720 - Subtract the two like fractions:
729/720 - 140/720 = 729 - 140/720 = 589/720
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/80-14/36 81/80-7/72 81/80-21/36 81/80-35/36 81/80-49/36