Subtract 1/21 from 63/12
1st number: 5 3/12, 2nd number: 1/21
63/12 - 1/21 is 437/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
63/12 = 63 × 7/12 × 7 = 441/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
1/21 = 1 × 4/21 × 4 = 4/84 - Subtract the two like fractions:
441/84 - 4/84 = 441 - 4/84 = 437/84 - In mixed form: 517/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/12-2/21 63/24-1/21 63/12-1/42 63/12-3/21 63/36-1/21 63/12-1/63 63/12-5/21 63/60-1/21 63/12-7/21 63/84-1/21