Subtract 81/32 from 20/36
1st number: 20/36, 2nd number: 2 17/32
20/36 - 81/32 is -569/288.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 32 is 288
Next, find the equivalent fraction of both fractional numbers with denominator 288 - For the 1st fraction, since 36 × 8 = 288,
20/36 = 20 × 8/36 × 8 = 160/288 - Likewise, for the 2nd fraction, since 32 × 9 = 288,
81/32 = 81 × 9/32 × 9 = 729/288 - Subtract the two like fractions:
160/288 - 729/288 = 160 - 729/288 = -569/288
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/36-81/32 20/72-81/32 20/36-81/64 60/36-81/32 20/36-81/96