Subtract 45/7 from 42/15
1st number: 2 12/15, 2nd number: 6 3/7
42/15 - 45/7 is -127/35.
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,
45/7 = 45 × 15/7 × 15 = 675/105 - Subtract the two like fractions:
294/105 - 675/105 = 294 - 675/105 = -381/105 - After reducing the fraction, the answer is -127/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15-45/7 42/15-90/7 42/30-45/7 42/15-45/14 42/45-45/7 42/15-45/21 42/75-45/7 42/15-45/35 42/15-45/49