Subtract 30/50 from 18/20
18/20 - 30/50 is 3/10.
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,
30/50 = 30 × 2/50 × 2 = 60/100 - Subtract the two like fractions:
90/100 - 60/100 = 90 - 60/100 = 30/100 - After reducing the fraction, the answer is 3/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20-30/50 18/20-60/50 18/40-30/50 54/20-30/50 18/20-90/50 18/60-30/50 90/20-30/50