Subtract 3/10 from 20/8
1st number: 2 4/8, 2nd number: 3/10
20/8 - 3/10 is 11/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 10 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
20/8 = 20 × 5/8 × 5 = 100/40 - Likewise, for the 2nd fraction, since 10 × 4 = 40,
3/10 = 3 × 4/10 × 4 = 12/40 - Subtract the two like fractions:
100/40 - 12/40 = 100 - 12/40 = 88/40 - After reducing the fraction, the answer is 11/5
- In mixed form: 21/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/8-3/10 20/8-6/10 20/16-3/10 20/8-3/20 60/8-3/10 20/8-9/10 20/24-3/10 20/8-3/30 20/8-15/10 20/40-3/10 20/8-3/50 20/8-21/10 20/56-3/10 20/8-3/70