Subtract 21/63 from 28/7
1st number: 4 0/7, 2nd number: 21/63
28/7 - 21/63 is 11/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
28/7 = 28 × 9/7 × 9 = 252/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
21/63 = 21 × 1/63 × 1 = 21/63 - Subtract the two like fractions:
252/63 - 21/63 = 252 - 21/63 = 231/63 - After reducing the fraction, the answer is 11/3
- In mixed form: 32/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/7-21/63 28/7-42/63 28/14-21/63 84/7-21/63 28/21-21/63 28/35-21/63 28/49-21/63