Subtract 9/21 from 63/12
1st number: 5 3/12, 2nd number: 9/21
63/12 - 9/21 is 135/28.
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,
9/21 = 9 × 4/21 × 4 = 36/84 - Subtract the two like fractions:
441/84 - 36/84 = 441 - 36/84 = 405/84 - After reducing the fraction, the answer is 135/28
- In mixed form: 423/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/12-18/21 63/24-9/21 63/12-9/42 63/12-27/21 63/36-9/21 63/12-9/63 63/12-45/21 63/60-9/21 63/12-63/21 63/84-9/21