Subtract 18/20 from 9/36
9/36 - 18/20 is -13/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
9/36 = 9 × 5/36 × 5 = 45/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
18/20 = 18 × 9/20 × 9 = 162/180 - Subtract the two like fractions:
45/180 - 162/180 = 45 - 162/180 = -117/180 - After reducing the fraction, the answer is -13/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/36-18/20 9/36-36/20 9/72-18/20 9/36-18/40 27/36-18/20 9/36-54/20 9/36-18/60 45/36-18/20 9/36-90/20 63/36-18/20