Subtract 20/21 from 63/36
1st number: 1 27/36, 2nd number: 20/21
63/36 - 20/21 is 67/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
63/36 = 63 × 7/36 × 7 = 441/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
20/21 = 20 × 12/21 × 12 = 240/252 - Subtract the two like fractions:
441/252 - 240/252 = 441 - 240/252 = 201/252 - After reducing the fraction, the answer is 67/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/36-40/21 63/72-20/21 63/36-20/42 63/36-60/21 63/36-20/63