Subtract 56/36 from 54/21
1st number: 2 12/21, 2nd number: 1 20/36
54/21 - 56/36 is 64/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 21 × 12 = 252,
54/21 = 54 × 12/21 × 12 = 648/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
56/36 = 56 × 7/36 × 7 = 392/252 - Subtract the two like fractions:
648/252 - 392/252 = 648 - 392/252 = 256/252 - After reducing the fraction, the answer is 64/63
- In mixed form: 11/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42-56/36 54/21-56/72 54/63-56/36