Subtract 25/36 from 4/21
4/21 - 25/36 is -127/252.
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,
4/21 = 4 × 12/21 × 12 = 48/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
25/36 = 25 × 7/36 × 7 = 175/252 - Subtract the two like fractions:
48/252 - 175/252 = 48 - 175/252 = -127/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21-25/36 4/21-50/36 4/42-25/36 4/21-25/72 12/21-25/36 4/21-75/36 4/63-25/36 20/21-25/36 28/21-25/36