Subtract 18/81 from 81/50
1st number: 1 31/50, 2nd number: 18/81
81/50 - 18/81 is 629/450.
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,
81/50 = 81 × 81/50 × 81 = 6561/4050 - Likewise, for the 2nd fraction, since 81 × 50 = 4050,
18/81 = 18 × 50/81 × 50 = 900/4050 - Subtract the two like fractions:
6561/4050 - 900/4050 = 6561 - 900/4050 = 5661/4050 - After reducing the fraction, the answer is 629/450
- In mixed form: 1179/450
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/50-36/81 81/50-54/81 81/50-90/81