Subtract 15/21 from 4/10
4/10 - 15/21 is -11/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
4/10 = 4 × 21/10 × 21 = 84/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
15/21 = 15 × 10/21 × 10 = 150/210 - Subtract the two like fractions:
84/210 - 150/210 = 84 - 150/210 = -66/210 - After reducing the fraction, the answer is -11/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/10-15/21 4/10-30/21 4/20-15/21 4/10-15/42 12/10-15/21 4/10-45/21 4/30-15/21 4/10-15/63 20/10-15/21 4/10-75/21 4/50-15/21 28/10-15/21 4/70-15/21