Subtract 3/81 from 7/50
7/50 - 3/81 is 139/1350.
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,
7/50 = 7 × 81/50 × 81 = 567/4050 - Likewise, for the 2nd fraction, since 81 × 50 = 4050,
3/81 = 3 × 50/81 × 50 = 150/4050 - Subtract the two like fractions:
567/4050 - 150/4050 = 567 - 150/4050 = 417/4050 - After reducing the fraction, the answer is 139/1350
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/50-3/81 7/50-6/81 21/50-3/81 7/50-9/81 35/50-3/81 7/50-15/81 49/50-3/81 7/50-21/81