Subtract 10/90 from 20/56
20/56 - 10/90 is 31/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 90 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 56 × 45 = 2520,
20/56 = 20 × 45/56 × 45 = 900/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
10/90 = 10 × 28/90 × 28 = 280/2520 - Subtract the two like fractions:
900/2520 - 280/2520 = 900 - 280/2520 = 620/2520 - After reducing the fraction, the answer is 31/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/56-10/90 20/56-20/90 60/56-10/90 20/56-30/90 20/56-50/90 20/56-70/90