Subtract 42/36 from 9/18
1st number: 9/18, 2nd number: 1 6/36
9/18 - 42/36 is -2/3.
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,
9/18 = 9 × 2/18 × 2 = 18/36 - Likewise, for the 2nd fraction, since 36 × 1 = 36,
42/36 = 42 × 1/36 × 1 = 42/36 - Subtract the two like fractions:
18/36 - 42/36 = 18 - 42/36 = -24/36 - After reducing the fraction, the answer is -2/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 9/18-84/36 9/36-42/36 9/18-42/72 27/18-42/36 9/54-42/36 45/18-42/36 9/90-42/36 63/18-42/36