Subtract 45/9 from 6/21
1st number: 6/21, 2nd number: 5 0/9
6/21 - 45/9 is -33/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 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 9 × 7 = 63,
45/9 = 45 × 7/9 × 7 = 315/63 - Subtract the two like fractions:
18/63 - 315/63 = 18 - 315/63 = -297/63 - After reducing the fraction, the answer is -33/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21-45/9 6/21-90/9 6/42-45/9 6/21-45/18 18/21-45/9 6/63-45/9 6/21-45/27 30/21-45/9 42/21-45/9 6/21-45/63