Subtract 3/21 from 5/36
5/36 - 3/21 is -1/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
5/36 = 5 × 7/36 × 7 = 35/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
3/21 = 3 × 12/21 × 12 = 36/252 - Subtract the two like fractions:
35/252 - 36/252 = 35 - 36/252 = -1/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/36-3/21 5/36-6/21 5/72-3/21 5/36-3/42 15/36-3/21 5/36-9/21 5/36-3/63 25/36-3/21 5/36-15/21 35/36-3/21