Subtract 40/3 from 42/18
1st number: 2 6/18, 2nd number: 13 1/3
42/18 - 40/3 is -11/1.
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,
42/18 = 42 × 1/18 × 1 = 42/18 - Likewise, for the 2nd fraction, since 3 × 6 = 18,
40/3 = 40 × 6/3 × 6 = 240/18 - Subtract the two like fractions:
42/18 - 240/18 = 42 - 240/18 = -198/18 - After reducing the fraction, the answer is -11/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18-40/3 42/18-80/3 42/36-40/3 42/18-40/6 42/54-40/3 42/18-40/9 42/90-40/3 42/18-40/15 42/18-40/21