Subtract 21/40 from 20/10
1st number: 2 0/10, 2nd number: 21/40
20/10 - 21/40 is 59/40.
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,
20/10 = 20 × 4/10 × 4 = 80/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
21/40 = 21 × 1/40 × 1 = 21/40 - Subtract the two like fractions:
80/40 - 21/40 = 80 - 21/40 = 59/40 - In mixed form: 119/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/10-21/40 20/10-42/40 20/10-21/80 60/10-21/40 20/10-63/40 20/30-21/40 20/50-21/40 20/70-21/40