Subtract 8/15 from 7/70
7/70 - 8/15 is -13/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
7/70 = 7 × 3/70 × 3 = 21/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
8/15 = 8 × 14/15 × 14 = 112/210 - Subtract the two like fractions:
21/210 - 112/210 = 21 - 112/210 = -91/210 - After reducing the fraction, the answer is -13/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/70-8/15 7/70-16/15 7/70-8/30 21/70-8/15 7/70-24/15 7/70-8/45 35/70-8/15 7/70-40/15 7/70-8/75 49/70-8/15 7/70-56/15