Subtract 8/7 from 27/42
1st number: 27/42, 2nd number: 1 1/7
27/42 - 8/7 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
27/42 = 27 × 1/42 × 1 = 27/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
8/7 = 8 × 6/7 × 6 = 48/42 - Subtract the two like fractions:
27/42 - 48/42 = 27 - 48/42 = -21/42 - After reducing the fraction, the answer is -1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42-8/7 27/42-16/7 27/84-8/7 27/42-8/14 81/42-8/7 27/42-24/7 27/42-8/21 27/42-40/7 27/42-8/35 27/42-56/7 27/42-8/49