Subtract 20/50 from 18/4
1st number: 4 2/4, 2nd number: 20/50
18/4 - 20/50 is 41/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 50 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 4 × 25 = 100,
18/4 = 18 × 25/4 × 25 = 450/100 - Likewise, for the 2nd fraction, since 50 × 2 = 100,
20/50 = 20 × 2/50 × 2 = 40/100 - Subtract the two like fractions:
450/100 - 40/100 = 450 - 40/100 = 410/100 - After reducing the fraction, the answer is 41/10
- In mixed form: 41/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/4-20/50 18/4-40/50 18/8-20/50 54/4-20/50 18/4-60/50 18/12-20/50 90/4-20/50 18/20-20/50 18/28-20/50