Subtract 21/15 from 35/10
1st number: 3 5/10, 2nd number: 1 6/15
35/10 - 21/15 is 21/10.
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,
35/10 = 35 × 3/10 × 3 = 105/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
21/15 = 21 × 2/15 × 2 = 42/30 - Subtract the two like fractions:
105/30 - 42/30 = 105 - 42/30 = 63/30 - After reducing the fraction, the answer is 21/10
- In mixed form: 21/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/10-21/15 35/10-42/15 35/20-21/15 35/10-21/30 35/10-63/15 35/30-21/15 35/10-21/45 35/50-21/15 35/10-21/75 35/70-21/15