Subtract 10/42 from 12/15
12/15 - 10/42 is 59/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
12/15 = 12 × 14/15 × 14 = 168/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
10/42 = 10 × 5/42 × 5 = 50/210 - Subtract the two like fractions:
168/210 - 50/210 = 168 - 50/210 = 118/210 - After reducing the fraction, the answer is 59/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/15-10/42 12/15-20/42 12/30-10/42 12/15-10/84 36/15-10/42 12/15-30/42 12/45-10/42 60/15-10/42 12/15-50/42 12/75-10/42 84/15-10/42 12/15-70/42