Subtract 6/63 from 21/7
1st number: 3 0/7, 2nd number: 6/63
21/7 - 6/63 is 61/21.
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,
21/7 = 21 × 9/7 × 9 = 189/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
6/63 = 6 × 1/63 × 1 = 6/63 - Subtract the two like fractions:
189/63 - 6/63 = 189 - 6/63 = 183/63 - After reducing the fraction, the answer is 61/21
- In mixed form: 219/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7-6/63 21/7-12/63 21/14-6/63 63/7-6/63 21/7-18/63 21/7-30/63 21/35-6/63 21/7-42/63 21/49-6/63