Subtract 30/21 from 27/14
1st number: 1 13/14, 2nd number: 1 9/21
27/14 - 30/21 is 1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
27/14 = 27 × 3/14 × 3 = 81/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
30/21 = 30 × 2/21 × 2 = 60/42 - Subtract the two like fractions:
81/42 - 60/42 = 81 - 60/42 = 21/42 - After reducing the fraction, the answer is 1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/14-30/21 27/14-60/21 27/28-30/21 27/14-30/42 81/14-30/21 27/14-90/21 27/42-30/21 27/14-30/63 27/70-30/21 27/98-30/21