Subtract 45/50 from 6/21
6/21 - 45/50 is -43/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 50 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 21 × 50 = 1050,
6/21 = 6 × 50/21 × 50 = 300/1050 - Likewise, for the 2nd fraction, since 50 × 21 = 1050,
45/50 = 45 × 21/50 × 21 = 945/1050 - Subtract the two like fractions:
300/1050 - 945/1050 = 300 - 945/1050 = -645/1050 - After reducing the fraction, the answer is -43/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21-45/50 6/21-90/50 6/42-45/50 18/21-45/50 6/63-45/50 30/21-45/50 42/21-45/50