Subtract 21/60 from 3/10
3/10 - 21/60 is -1/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 60 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 10 × 6 = 60,
3/10 = 3 × 6/10 × 6 = 18/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
21/60 = 21 × 1/60 × 1 = 21/60 - Subtract the two like fractions:
18/60 - 21/60 = 18 - 21/60 = -3/60 - After reducing the fraction, the answer is -1/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/10-21/60 3/10-42/60 3/20-21/60 9/10-21/60 3/10-63/60 3/30-21/60 15/10-21/60 3/50-21/60 21/10-21/60 3/70-21/60