Subtract 56/21 from 28/27
1st number: 1 1/27, 2nd number: 2 14/21
28/27 - 56/21 is -44/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 21 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 27 × 7 = 189,
28/27 = 28 × 7/27 × 7 = 196/189 - Likewise, for the 2nd fraction, since 21 × 9 = 189,
56/21 = 56 × 9/21 × 9 = 504/189 - Subtract the two like fractions:
196/189 - 504/189 = 196 - 504/189 = -308/189 - After reducing the fraction, the answer is -44/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/27-56/21 28/54-56/21 28/27-56/42 84/27-56/21 28/81-56/21 28/27-56/63