Subtract 7/42 from 27/15
1st number: 1 12/15, 2nd number: 7/42
27/15 - 7/42 is 49/30.
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,
27/15 = 27 × 14/15 × 14 = 378/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
7/42 = 7 × 5/42 × 5 = 35/210 - Subtract the two like fractions:
378/210 - 35/210 = 378 - 35/210 = 343/210 - After reducing the fraction, the answer is 49/30
- In mixed form: 119/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/15-7/42 27/15-14/42 27/30-7/42 27/15-7/84 81/15-7/42 27/15-21/42 27/45-7/42 27/15-35/42 27/75-7/42 27/15-49/42