Subtract 10/21 from 6/27
6/27 - 10/21 is -16/63.
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,
6/27 = 6 × 7/27 × 7 = 42/189 - Likewise, for the 2nd fraction, since 21 × 9 = 189,
10/21 = 10 × 9/21 × 9 = 90/189 - Subtract the two like fractions:
42/189 - 90/189 = 42 - 90/189 = -48/189 - After reducing the fraction, the answer is -16/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/27-10/21 6/27-20/21 6/54-10/21 6/27-10/42 18/27-10/21 6/27-30/21 6/81-10/21 6/27-10/63 30/27-10/21 6/27-50/21 42/27-10/21 6/27-70/21