Subtract 70/40 from 25/15
1st number: 1 10/15, 2nd number: 1 30/40
25/15 - 70/40 is -1/12.
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,
25/15 = 25 × 8/15 × 8 = 200/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
70/40 = 70 × 3/40 × 3 = 210/120 - Subtract the two like fractions:
200/120 - 210/120 = 200 - 210/120 = -10/120 - After reducing the fraction, the answer is -1/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/15-70/40 25/30-70/40 25/15-70/80 75/15-70/40 25/45-70/40 25/75-70/40