Subtract 75/42 from 20/56
1st number: 20/56, 2nd number: 1 33/42
20/56 - 75/42 is -10/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 56 × 3 = 168,
20/56 = 20 × 3/56 × 3 = 60/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
75/42 = 75 × 4/42 × 4 = 300/168 - Subtract the two like fractions:
60/168 - 300/168 = 60 - 300/168 = -240/168 - After reducing the fraction, the answer is -10/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/56-75/42 20/56-75/84 60/56-75/42