Subtract 25/36 from 21/15
1st number: 1 6/15, 2nd number: 25/36
21/15 - 25/36 is 127/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 15 × 12 = 180,
21/15 = 21 × 12/15 × 12 = 252/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
25/36 = 25 × 5/36 × 5 = 125/180 - Subtract the two like fractions:
252/180 - 125/180 = 252 - 125/180 = 127/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15-25/36 21/15-50/36 21/30-25/36 21/15-25/72 63/15-25/36 21/15-75/36 21/45-25/36 21/75-25/36