Subtract 40/50 from 18/20
18/20 - 40/50 is 1/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 50 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 20 × 5 = 100,
18/20 = 18 × 5/20 × 5 = 90/100 - Likewise, for the 2nd fraction, since 50 × 2 = 100,
40/50 = 40 × 2/50 × 2 = 80/100 - Subtract the two like fractions:
90/100 - 80/100 = 90 - 80/100 = 10/100 - After reducing the fraction, the answer is 1/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20-40/50 18/20-80/50 18/40-40/50 54/20-40/50 18/60-40/50 90/20-40/50