Subtract 8/15 from 21/60
21/60 - 8/15 is -11/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 60 × 1 = 60,
21/60 = 21 × 1/60 × 1 = 21/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
8/15 = 8 × 4/15 × 4 = 32/60 - Subtract the two like fractions:
21/60 - 32/60 = 21 - 32/60 = -11/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/60-8/15 21/60-16/15 21/60-8/30 63/60-8/15 21/60-24/15 21/60-8/45 21/60-40/15 21/60-8/75 21/60-56/15