Subtract 40/18 from 20/50
1st number: 20/50, 2nd number: 2 4/18
20/50 - 40/18 is -82/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 18 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 50 × 9 = 450,
20/50 = 20 × 9/50 × 9 = 180/450 - Likewise, for the 2nd fraction, since 18 × 25 = 450,
40/18 = 40 × 25/18 × 25 = 1000/450 - Subtract the two like fractions:
180/450 - 1000/450 = 180 - 1000/450 = -820/450 - After reducing the fraction, the answer is -82/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/50-40/18 20/50-80/18 20/50-40/36 60/50-40/18 20/50-40/54 20/50-40/90