Subtract 9/50 from 3/81, Solve 3/81

Subtract 9/50 from 3/81

3/81 - 9/50 is -193/1350.

Find the least common denominator or LCM of the two denominators:
LCM of 81 and 50 is 4050

Next, find the equivalent fraction of both fractional numbers with denominator 4050
For the 1st fraction, since 81 × 50 = 4050,
3/81 = 3 × 50/81 × 50 = 150/4050
Likewise, for the 2nd fraction, since 50 × 81 = 4050,
9/50 = 9 × 81/50 × 81 = 729/4050
Subtract the two like fractions:
150/4050 - 729/4050 = 150 - 729/4050 = -579/4050
After reducing the fraction, the answer is -193/1350

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad