Subtract 42/18 from 40/9
1st number: 4 4/9, 2nd number: 2 6/18
40/9 - 42/18 is 19/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 18 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 9 × 2 = 18,
40/9 = 40 × 2/9 × 2 = 80/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
42/18 = 42 × 1/18 × 1 = 42/18 - Subtract the two like fractions:
80/18 - 42/18 = 80 - 42/18 = 38/18 - After reducing the fraction, the answer is 19/9
- In mixed form: 21/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/9-42/18 40/9-84/18 40/18-42/18 40/9-42/36 40/27-42/18 40/9-42/54 40/45-42/18 40/9-42/90 40/63-42/18