Subtract 20/56 from 10/84
10/84 - 20/56 is -5/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 84 × 2 = 168,
10/84 = 10 × 2/84 × 2 = 20/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
20/56 = 20 × 3/56 × 3 = 60/168 - Subtract the two like fractions:
20/168 - 60/168 = 20 - 60/168 = -40/168 - After reducing the fraction, the answer is -5/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/84-20/56 10/84-40/56 30/84-20/56 10/84-60/56 50/84-20/56 70/84-20/56