Subtract 6/21 from 27/42
27/42 - 6/21 is 5/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
27/42 = 27 × 1/42 × 1 = 27/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
6/21 = 6 × 2/21 × 2 = 12/42 - Subtract the two like fractions:
27/42 - 12/42 = 27 - 12/42 = 15/42 - After reducing the fraction, the answer is 5/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42-6/21 27/42-12/21 27/84-6/21 27/42-6/42 81/42-6/21 27/42-18/21 27/42-6/63 27/42-30/21 27/42-42/21