Subtract 10/18 from 5/20
5/20 - 10/18 is -11/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
5/20 = 5 × 9/20 × 9 = 45/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
10/18 = 10 × 10/18 × 10 = 100/180 - Subtract the two like fractions:
45/180 - 100/180 = 45 - 100/180 = -55/180 - After reducing the fraction, the answer is -11/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/20-10/18 5/20-20/18 5/40-10/18 5/20-10/36 15/20-10/18 5/20-30/18 5/60-10/18 5/20-10/54 25/20-10/18 5/20-50/18 5/20-10/90 35/20-10/18 5/20-70/18