Subtract 28/63 from 81/4
1st number: 20 1/4, 2nd number: 28/63
81/4 - 28/63 is 713/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 4 × 63 = 252,
81/4 = 81 × 63/4 × 63 = 5103/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
28/63 = 28 × 4/63 × 4 = 112/252 - Subtract the two like fractions:
5103/252 - 112/252 = 5103 - 112/252 = 4991/252 - After reducing the fraction, the answer is 713/36
- In mixed form: 1929/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/4-56/63 81/8-28/63 81/4-84/63 81/12-28/63 81/20-28/63 81/28-28/63