Subtract 90/14 from 42/15
1st number: 2 12/15, 2nd number: 6 6/14
42/15 - 90/14 is -127/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 14 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
42/15 = 42 × 14/15 × 14 = 588/210 - Likewise, for the 2nd fraction, since 14 × 15 = 210,
90/14 = 90 × 15/14 × 15 = 1350/210 - Subtract the two like fractions:
588/210 - 1350/210 = 588 - 1350/210 = -762/210 - 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: 84/15-90/14 42/30-90/14 42/15-90/28 42/45-90/14 42/15-90/42 42/75-90/14 42/15-90/70 42/15-90/98