Subtract 7/36 from 8/21
8/21 - 7/36 is 47/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 21 × 12 = 252,
8/21 = 8 × 12/21 × 12 = 96/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
7/36 = 7 × 7/36 × 7 = 49/252 - Subtract the two like fractions:
96/252 - 49/252 = 96 - 49/252 = 47/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21-7/36 8/21-14/36 8/42-7/36 8/21-7/72 24/21-7/36 8/21-21/36 8/63-7/36 40/21-7/36 8/21-35/36 56/21-7/36 8/21-49/36