Subtract 12/18 from 9/5
1st number: 1 4/5, 2nd number: 12/18
9/5 - 12/18 is 17/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
9/5 = 9 × 18/5 × 18 = 162/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
12/18 = 12 × 5/18 × 5 = 60/90 - Subtract the two like fractions:
162/90 - 60/90 = 162 - 60/90 = 102/90 - After reducing the fraction, the answer is 17/15
- In mixed form: 12/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/5-12/18 9/5-24/18 9/10-12/18 9/5-12/36 27/5-12/18 9/5-36/18 9/15-12/18 9/5-12/54 45/5-12/18 9/5-60/18 9/25-12/18 9/5-12/90 63/5-12/18 9/5-84/18 9/35-12/18