Subtract 40/70 from 7/15
7/15 - 40/70 is -11/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
7/15 = 7 × 14/15 × 14 = 98/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
40/70 = 40 × 3/70 × 3 = 120/210 - Subtract the two like fractions:
98/210 - 120/210 = 98 - 120/210 = -22/210 - After reducing the fraction, the answer is -11/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/15-40/70 7/15-80/70 7/30-40/70 21/15-40/70 7/45-40/70 35/15-40/70 7/75-40/70 49/15-40/70