Subtract 3/40 from 20/10
1st number: 2 0/10, 2nd number: 3/40
20/10 - 3/40 is 77/40.
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,
3/40 = 3 × 1/40 × 1 = 3/40 - Subtract the two like fractions:
80/40 - 3/40 = 80 - 3/40 = 77/40 - In mixed form: 137/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/10-3/40 20/10-6/40 20/10-3/80 60/10-3/40 20/10-9/40 20/30-3/40 20/10-15/40 20/50-3/40 20/10-21/40 20/70-3/40