Subtract 6/63 from 21/27
21/27 - 6/63 is 43/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 63 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 27 × 7 = 189,
21/27 = 21 × 7/27 × 7 = 147/189 - Likewise, for the 2nd fraction, since 63 × 3 = 189,
6/63 = 6 × 3/63 × 3 = 18/189 - Subtract the two like fractions:
147/189 - 18/189 = 147 - 18/189 = 129/189 - After reducing the fraction, the answer is 43/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/27-6/63 21/27-12/63 21/54-6/63 63/27-6/63 21/27-18/63 21/81-6/63 21/27-30/63 21/27-42/63