Subtract 7/27 from 54/21
1st number: 2 12/21, 2nd number: 7/27
54/21 - 7/27 is 437/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 21 × 9 = 189,
54/21 = 54 × 9/21 × 9 = 486/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
7/27 = 7 × 7/27 × 7 = 49/189 - Subtract the two like fractions:
486/189 - 49/189 = 486 - 49/189 = 437/189 - In mixed form: 259/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21-14/27 54/42-7/27 54/21-7/54 54/21-21/27 54/63-7/27 54/21-7/81 54/21-35/27 54/21-49/27