Subtract 9/30 from 40/18
1st number: 2 4/18, 2nd number: 9/30
40/18 - 9/30 is 173/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
40/18 = 40 × 5/18 × 5 = 200/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
9/30 = 9 × 3/30 × 3 = 27/90 - Subtract the two like fractions:
200/90 - 27/90 = 200 - 27/90 = 173/90 - In mixed form: 183/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/18-9/30 40/18-18/30 40/36-9/30 40/18-9/60 40/18-27/30 40/54-9/30 40/18-9/90 40/18-45/30 40/90-9/30 40/18-63/30