Subtract 15/36 from 90/18
1st number: 5 0/18, 2nd number: 15/36
90/18 - 15/36 is 55/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 36 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 36 × 1 = 36,
15/36 = 15 × 1/36 × 1 = 15/36 - Subtract the two like fractions:
180/36 - 15/36 = 180 - 15/36 = 165/36 - After reducing the fraction, the answer is 55/12
- In mixed form: 47/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18-30/36 90/36-15/36 90/18-15/72 90/18-45/36 90/54-15/36 90/18-75/36