Subtract 25/7 from 42/15
1st number: 2 12/15, 2nd number: 3 4/7
42/15 - 25/7 is -27/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 7 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
42/15 = 42 × 7/15 × 7 = 294/105 - Likewise, for the 2nd fraction, since 7 × 15 = 105,
25/7 = 25 × 15/7 × 15 = 375/105 - Subtract the two like fractions:
294/105 - 375/105 = 294 - 375/105 = -81/105 - After reducing the fraction, the answer is -27/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15-25/7 42/15-50/7 42/30-25/7 42/15-25/14 42/15-75/7 42/45-25/7 42/15-25/21 42/75-25/7 42/15-25/35 42/15-25/49