Subtract 7/15 from 1/42
1/42 - 7/15 is -31/70.
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,
1/42 = 1 × 5/42 × 5 = 5/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
7/15 = 7 × 14/15 × 14 = 98/210 - Subtract the two like fractions:
5/210 - 98/210 = 5 - 98/210 = -93/210 - After reducing the fraction, the answer is -31/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/42-7/15 1/42-14/15 1/84-7/15 1/42-7/30 3/42-7/15 1/42-21/15 1/42-7/45 5/42-7/15 1/42-35/15 1/42-7/75 7/42-7/15 1/42-49/15