Subtract 24/81 from 21/50
21/50 - 24/81 is 167/1350.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 81 is 4050
Next, find the equivalent fraction of both fractional numbers with denominator 4050 - For the 1st fraction, since 50 × 81 = 4050,
21/50 = 21 × 81/50 × 81 = 1701/4050 - Likewise, for the 2nd fraction, since 81 × 50 = 4050,
24/81 = 24 × 50/81 × 50 = 1200/4050 - Subtract the two like fractions:
1701/4050 - 1200/4050 = 1701 - 1200/4050 = 501/4050 - After reducing the fraction, the answer is 167/1350
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/50-24/81 21/50-48/81 63/50-24/81 21/50-72/81