Subtract 6/15 from 12/42
12/42 - 6/15 is -4/35.
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,
12/42 = 12 × 5/42 × 5 = 60/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
6/15 = 6 × 14/15 × 14 = 84/210 - Subtract the two like fractions:
60/210 - 84/210 = 60 - 84/210 = -24/210 - After reducing the fraction, the answer is -4/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42-6/15 12/42-12/15 12/84-6/15 12/42-6/30 36/42-6/15 12/42-18/15 12/42-6/45 60/42-6/15 12/42-30/15 12/42-6/75 84/42-6/15 12/42-42/15