Subtract 40/50 from 5/18
5/18 - 40/50 is -47/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 50 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 18 × 25 = 450,
5/18 = 5 × 25/18 × 25 = 125/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
40/50 = 40 × 9/50 × 9 = 360/450 - Subtract the two like fractions:
125/450 - 360/450 = 125 - 360/450 = -235/450 - After reducing the fraction, the answer is -47/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/18-40/50 5/18-80/50 5/36-40/50 15/18-40/50 5/54-40/50 25/18-40/50 5/90-40/50 35/18-40/50