Subtract 5/15 from 6/42
6/42 - 5/15 is -4/21.
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,
6/42 = 6 × 5/42 × 5 = 30/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
5/15 = 5 × 14/15 × 14 = 70/210 - Subtract the two like fractions:
30/210 - 70/210 = 30 - 70/210 = -40/210 - After reducing the fraction, the answer is -4/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/42-5/15 6/42-10/15 6/84-5/15 6/42-5/30 18/42-5/15 6/42-5/45 30/42-5/15 6/42-25/15 6/42-5/75 6/42-35/15