Subtract 3/15 from 21/10
1st number: 2 1/10, 2nd number: 3/15
21/10 - 3/15 is 19/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 10 × 3 = 30,
21/10 = 21 × 3/10 × 3 = 63/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
3/15 = 3 × 2/15 × 2 = 6/30 - Subtract the two like fractions:
63/30 - 6/30 = 63 - 6/30 = 57/30 - After reducing the fraction, the answer is 19/10
- In mixed form: 19/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10-3/15 21/10-6/15 21/20-3/15 21/10-3/30 63/10-3/15 21/10-9/15 21/30-3/15 21/10-3/45 21/50-3/15 21/10-3/75 21/10-21/15 21/70-3/15