Subtract 42/56 from 12/27
12/27 - 42/56 is -11/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 56 is 1512
Next, find the equivalent fraction of both fractional numbers with denominator 1512 - For the 1st fraction, since 27 × 56 = 1512,
12/27 = 12 × 56/27 × 56 = 672/1512 - Likewise, for the 2nd fraction, since 56 × 27 = 1512,
42/56 = 42 × 27/56 × 27 = 1134/1512 - Subtract the two like fractions:
672/1512 - 1134/1512 = 672 - 1134/1512 = -462/1512 - After reducing the fraction, the answer is -11/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/27-42/56 12/27-84/56 12/54-42/56 36/27-42/56 12/81-42/56 60/27-42/56 84/27-42/56