Subtract 15/10 from 21/2
1st number: 10 1/2, 2nd number: 1 5/10
21/2 - 15/10 is 9/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 10 is 10
Next, find the equivalent fraction of both fractional numbers with denominator 10 - For the 1st fraction, since 2 × 5 = 10,
21/2 = 21 × 5/2 × 5 = 105/10 - Likewise, for the 2nd fraction, since 10 × 1 = 10,
15/10 = 15 × 1/10 × 1 = 15/10 - Subtract the two like fractions:
105/10 - 15/10 = 105 - 15/10 = 90/10 - After reducing the fraction, the answer is 9/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2-15/10 21/2-30/10 21/4-15/10 21/2-15/20 63/2-15/10 21/2-45/10 21/6-15/10 21/2-15/30 21/2-75/10 21/10-15/10 21/2-15/50 21/14-15/10 21/2-15/70