Subtract 90/3 from 12/18
1st number: 12/18, 2nd number: 30 0/3
12/18 - 90/3 is -88/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 3 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
12/18 = 12 × 1/18 × 1 = 12/18 - Likewise, for the 2nd fraction, since 3 × 6 = 18,
90/3 = 90 × 6/3 × 6 = 540/18 - Subtract the two like fractions:
12/18 - 540/18 = 12 - 540/18 = -528/18 - After reducing the fraction, the answer is -88/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/18-90/3 12/36-90/3 12/18-90/6 36/18-90/3 12/54-90/3 12/18-90/9 60/18-90/3 12/90-90/3 12/18-90/15 84/18-90/3 12/18-90/21