Subtract 3/12 from 90/18
1st number: 5 0/18, 2nd number: 3/12
90/18 - 3/12 is 19/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 12 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 18 × 2 = 36,
90/18 = 90 × 2/18 × 2 = 180/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
3/12 = 3 × 3/12 × 3 = 9/36 - Subtract the two like fractions:
180/36 - 9/36 = 180 - 9/36 = 171/36 - After reducing the fraction, the answer is 19/4
- In mixed form: 43/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18-6/12 90/36-3/12 90/18-3/24 90/18-9/12 90/54-3/12 90/18-3/36 90/18-15/12 90/18-3/60 90/18-21/12 90/18-3/84