Subtract 2/40 from 18/36
18/36 - 2/40 is 9/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 36 × 10 = 360,
18/36 = 18 × 10/36 × 10 = 180/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
2/40 = 2 × 9/40 × 9 = 18/360 - Subtract the two like fractions:
180/360 - 18/360 = 180 - 18/360 = 162/360 - After reducing the fraction, the answer is 9/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/36-4/40 18/72-2/40 18/36-2/80 54/36-2/40 18/36-6/40 90/36-2/40 18/36-10/40 18/36-14/40