Subtract 6/63 from 8/21
8/21 - 6/63 is 2/7.
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,
8/21 = 8 × 3/21 × 3 = 24/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
6/63 = 6 × 1/63 × 1 = 6/63 - Subtract the two like fractions:
24/63 - 6/63 = 24 - 6/63 = 18/63 - After reducing the fraction, the answer is 2/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21-6/63 8/21-12/63 8/42-6/63 24/21-6/63 8/21-18/63 8/63-6/63 40/21-6/63 8/21-30/63 56/21-6/63 8/21-42/63