Subtract 6/15 from 7/42
7/42 - 6/15 is -7/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
7/42 = 7 × 5/42 × 5 = 35/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
6/15 = 6 × 14/15 × 14 = 84/210 - Subtract the two like fractions:
35/210 - 84/210 = 35 - 84/210 = -49/210 - After reducing the fraction, the answer is -7/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/42-6/15 7/42-12/15 7/84-6/15 7/42-6/30 21/42-6/15 7/42-18/15 7/42-6/45 35/42-6/15 7/42-30/15 7/42-6/75 49/42-6/15 7/42-42/15