Subtract 81/14 from 20/36
1st number: 20/36, 2nd number: 5 11/14
20/36 - 81/14 is -659/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 14 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
20/36 = 20 × 7/36 × 7 = 140/252 - Likewise, for the 2nd fraction, since 14 × 18 = 252,
81/14 = 81 × 18/14 × 18 = 1458/252 - Subtract the two like fractions:
140/252 - 1458/252 = 140 - 1458/252 = -1318/252 - After reducing the fraction, the answer is -659/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/36-81/14 20/72-81/14 20/36-81/28 60/36-81/14 20/36-81/42 20/36-81/70 20/36-81/98