Subtract 27/10 from 20/8
1st number: 2 4/8, 2nd number: 2 7/10
20/8 - 27/10 is -1/5.
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,
27/10 = 27 × 4/10 × 4 = 108/40 - Subtract the two like fractions:
100/40 - 108/40 = 100 - 108/40 = -8/40 - After reducing the fraction, the answer is -1/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/8-27/10 20/8-54/10 20/16-27/10 20/8-27/20 60/8-27/10 20/8-81/10 20/24-27/10 20/8-27/30 20/40-27/10 20/8-27/50 20/56-27/10 20/8-27/70