Subtract 75/27 from 6/21
1st number: 6/21, 2nd number: 2 21/27
6/21 - 75/27 is -157/63.
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,
6/21 = 6 × 9/21 × 9 = 54/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
75/27 = 75 × 7/27 × 7 = 525/189 - Subtract the two like fractions:
54/189 - 525/189 = 54 - 525/189 = -471/189 - After reducing the fraction, the answer is -157/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21-75/27 6/42-75/27 6/21-75/54 18/21-75/27 6/63-75/27 6/21-75/81 30/21-75/27 42/21-75/27