Subtract 63/12 from 21/14
1st number: 1 7/14, 2nd number: 5 3/12
21/14 - 63/12 is -15/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 14 × 6 = 84,
21/14 = 21 × 6/14 × 6 = 126/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
63/12 = 63 × 7/12 × 7 = 441/84 - Subtract the two like fractions:
126/84 - 441/84 = 126 - 441/84 = -315/84 - After reducing the fraction, the answer is -15/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14-63/12 21/28-63/12 21/14-63/24 63/14-63/12 21/42-63/12 21/14-63/36 21/70-63/12 21/14-63/60 21/98-63/12 21/14-63/84