Subtract 42/6 from 40/18
1st number: 2 4/18, 2nd number: 7 0/6
40/18 - 42/6 is -43/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 6 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
40/18 = 40 × 1/18 × 1 = 40/18 - Likewise, for the 2nd fraction, since 6 × 3 = 18,
42/6 = 42 × 3/6 × 3 = 126/18 - Subtract the two like fractions:
40/18 - 126/18 = 40 - 126/18 = -86/18 - After reducing the fraction, the answer is -43/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/18-42/6 40/18-84/6 40/36-42/6 40/18-42/12 40/54-42/6 40/18-42/18 40/90-42/6 40/18-42/30