Subtract 12/42 from 7/15
7/15 - 12/42 is 19/105.
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,
7/15 = 7 × 14/15 × 14 = 98/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
12/42 = 12 × 5/42 × 5 = 60/210 - Subtract the two like fractions:
98/210 - 60/210 = 98 - 60/210 = 38/210 - After reducing the fraction, the answer is 19/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/15-12/42 7/15-24/42 7/30-12/42 7/15-12/84 21/15-12/42 7/15-36/42 7/45-12/42 35/15-12/42 7/15-60/42 7/75-12/42 49/15-12/42 7/15-84/42