Subtract 70/63 from 6/21
1st number: 6/21, 2nd number: 1 7/63
6/21 - 70/63 is -52/63.
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,
6/21 = 6 × 3/21 × 3 = 18/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
70/63 = 70 × 1/63 × 1 = 70/63 - Subtract the two like fractions:
18/63 - 70/63 = 18 - 70/63 = -52/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21-70/63 6/42-70/63 18/21-70/63 6/63-70/63 30/21-70/63 42/21-70/63