Subtract 81/10 from 10/8
1st number: 1 2/8, 2nd number: 8 1/10
10/8 - 81/10 is -137/20.
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,
10/8 = 10 × 5/8 × 5 = 50/40 - Likewise, for the 2nd fraction, since 10 × 4 = 40,
81/10 = 81 × 4/10 × 4 = 324/40 - Subtract the two like fractions:
50/40 - 324/40 = 50 - 324/40 = -274/40 - After reducing the fraction, the answer is -137/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/8-81/10 10/16-81/10 10/8-81/20 30/8-81/10 10/24-81/10 10/8-81/30 50/8-81/10 10/40-81/10 10/8-81/50 70/8-81/10 10/56-81/10 10/8-81/70