Subtract 36/20 from 14/21
1st number: 14/21, 2nd number: 1 16/20
14/21 - 36/20 is -17/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
14/21 = 14 × 20/21 × 20 = 280/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
36/20 = 36 × 21/20 × 21 = 756/420 - Subtract the two like fractions:
280/420 - 756/420 = 280 - 756/420 = -476/420 - After reducing the fraction, the answer is -17/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/21-36/20 14/21-72/20 14/42-36/20 14/21-36/40 42/21-36/20 14/63-36/20 14/21-36/60 70/21-36/20 98/21-36/20