Subtract 3/18 from 40/45
40/45 - 3/18 is 13/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
40/45 = 40 × 2/45 × 2 = 80/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
3/18 = 3 × 5/18 × 5 = 15/90 - Subtract the two like fractions:
80/90 - 15/90 = 80 - 15/90 = 65/90 - After reducing the fraction, the answer is 13/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/45-3/18 40/45-6/18 40/90-3/18 40/45-3/36 40/45-9/18 40/45-3/54 40/45-15/18 40/45-3/90 40/45-21/18