Subtract 12/56 from 21/49
21/49 - 12/56 is 3/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 56 is 392
Next, find the equivalent fraction of both fractional numbers with denominator 392 - For the 1st fraction, since 49 × 8 = 392,
21/49 = 21 × 8/49 × 8 = 168/392 - Likewise, for the 2nd fraction, since 56 × 7 = 392,
12/56 = 12 × 7/56 × 7 = 84/392 - Subtract the two like fractions:
168/392 - 84/392 = 168 - 84/392 = 84/392 - After reducing the fraction, the answer is 3/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/49-12/56 21/49-24/56 21/98-12/56 63/49-12/56 21/49-36/56 21/49-60/56 21/49-84/56