Subtract 70/40 from 10/15
1st number: 10/15, 2nd number: 1 30/40
10/15 - 70/40 is -13/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
10/15 = 10 × 8/15 × 8 = 80/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
70/40 = 70 × 3/40 × 3 = 210/120 - Subtract the two like fractions:
80/120 - 210/120 = 80 - 210/120 = -130/120 - After reducing the fraction, the answer is -13/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/15-70/40 10/30-70/40 10/15-70/80 30/15-70/40 10/45-70/40 50/15-70/40 10/75-70/40 70/15-70/40