Subtract 6/63 from 7/21
7/21 - 6/63 is 5/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
7/21 = 7 × 3/21 × 3 = 21/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
6/63 = 6 × 1/63 × 1 = 6/63 - Subtract the two like fractions:
21/63 - 6/63 = 21 - 6/63 = 15/63 - After reducing the fraction, the answer is 5/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21-6/63 7/21-12/63 7/42-6/63 7/21-18/63 7/63-6/63 35/21-6/63 7/21-30/63 49/21-6/63 7/21-42/63