Subtract 8/15 from 1/42
1/42 - 8/15 is -107/210.
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,
8/15 = 8 × 14/15 × 14 = 112/210 - Subtract the two like fractions:
5/210 - 112/210 = 5 - 112/210 = -107/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/42-8/15 1/42-16/15 1/84-8/15 1/42-8/30 3/42-8/15 1/42-24/15 1/42-8/45 5/42-8/15 1/42-40/15 1/42-8/75 7/42-8/15 1/42-56/15