Subtract 9/12 from 21/50
21/50 - 9/12 is -33/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 12 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 50 × 6 = 300,
21/50 = 21 × 6/50 × 6 = 126/300 - Likewise, for the 2nd fraction, since 12 × 25 = 300,
9/12 = 9 × 25/12 × 25 = 225/300 - Subtract the two like fractions:
126/300 - 225/300 = 126 - 225/300 = -99/300 - After reducing the fraction, the answer is -33/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/50-9/12 21/50-18/12 21/50-9/24 63/50-9/12 21/50-27/12 21/50-9/36 21/50-45/12 21/50-9/60 21/50-63/12 21/50-9/84