Subtract 1/15 from 15/42
15/42 - 1/15 is 61/210.
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,
15/42 = 15 × 5/42 × 5 = 75/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
1/15 = 1 × 14/15 × 14 = 14/210 - Subtract the two like fractions:
75/210 - 14/210 = 75 - 14/210 = 61/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42-1/15 15/42-2/15 15/84-1/15 15/42-1/30 45/42-1/15 15/42-3/15 15/42-1/45 75/42-1/15 15/42-5/15 15/42-1/75 15/42-7/15