Subtract 20/56 from 21/9
1st number: 2 3/9, 2nd number: 20/56
21/9 - 20/56 is 83/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 56 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 9 × 56 = 504,
21/9 = 21 × 56/9 × 56 = 1176/504 - Likewise, for the 2nd fraction, since 56 × 9 = 504,
20/56 = 20 × 9/56 × 9 = 180/504 - Subtract the two like fractions:
1176/504 - 180/504 = 1176 - 180/504 = 996/504 - After reducing the fraction, the answer is 83/42
- In mixed form: 141/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/9-20/56 21/9-40/56 21/18-20/56 63/9-20/56 21/9-60/56 21/27-20/56 21/45-20/56 21/63-20/56