Subtract 21/81 from 2/50
2/50 - 21/81 is -148/675.
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,
2/50 = 2 × 81/50 × 81 = 162/4050 - Likewise, for the 2nd fraction, since 81 × 50 = 4050,
21/81 = 21 × 50/81 × 50 = 1050/4050 - Subtract the two like fractions:
162/4050 - 1050/4050 = 162 - 1050/4050 = -888/4050 - After reducing the fraction, the answer is -148/675
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/50-21/81 2/50-42/81 6/50-21/81 2/50-63/81 10/50-21/81 14/50-21/81