Subtract 10/81 from 40/50
40/50 - 10/81 is 274/405.
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,
40/50 = 40 × 81/50 × 81 = 3240/4050 - Likewise, for the 2nd fraction, since 81 × 50 = 4050,
10/81 = 10 × 50/81 × 50 = 500/4050 - Subtract the two like fractions:
3240/4050 - 500/4050 = 3240 - 500/4050 = 2740/4050 - After reducing the fraction, the answer is 274/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/50-10/81 40/50-20/81 40/50-30/81 40/50-50/81 40/50-70/81