Subtract 50/40 from 21/10
1st number: 2 1/10, 2nd number: 1 10/40
21/10 - 50/40 is 17/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
21/10 = 21 × 4/10 × 4 = 84/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
50/40 = 50 × 1/40 × 1 = 50/40 - Subtract the two like fractions:
84/40 - 50/40 = 84 - 50/40 = 34/40 - After reducing the fraction, the answer is 17/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10-50/40 21/20-50/40 21/10-50/80 63/10-50/40 21/30-50/40 21/50-50/40 21/70-50/40