Subtract 70/40 from 7/8
1st number: 7/8, 2nd number: 1 30/40
7/8 - 70/40 is -7/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
7/8 = 7 × 5/8 × 5 = 35/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
70/40 = 70 × 1/40 × 1 = 70/40 - Subtract the two like fractions:
35/40 - 70/40 = 35 - 70/40 = -35/40 - After reducing the fraction, the answer is -7/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/8-70/40 7/16-70/40 7/8-70/80 21/8-70/40 7/24-70/40 35/8-70/40 7/40-70/40 49/8-70/40 7/56-70/40