Subtract 10/45 from 21/56
21/56 - 10/45 is 11/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 45 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 56 × 45 = 2520,
21/56 = 21 × 45/56 × 45 = 945/2520 - Likewise, for the 2nd fraction, since 45 × 56 = 2520,
10/45 = 10 × 56/45 × 56 = 560/2520 - Subtract the two like fractions:
945/2520 - 560/2520 = 945 - 560/2520 = 385/2520 - After reducing the fraction, the answer is 11/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/56-10/45 21/56-20/45 21/56-10/90 63/56-10/45 21/56-30/45 21/56-50/45 21/56-70/45