Subtract 81/70 from 2/8
1st number: 2/8, 2nd number: 1 11/70
2/8 - 81/70 is -127/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 8 × 35 = 280,
2/8 = 2 × 35/8 × 35 = 70/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
81/70 = 81 × 4/70 × 4 = 324/280 - Subtract the two like fractions:
70/280 - 324/280 = 70 - 324/280 = -254/280 - After reducing the fraction, the answer is -127/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/8-81/70 2/16-81/70 6/8-81/70 2/24-81/70 10/8-81/70 2/40-81/70 14/8-81/70 2/56-81/70