Subtract 3/18 from 42/9
1st number: 4 6/9, 2nd number: 3/18
42/9 - 3/18 is 9/2.
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,
42/9 = 42 × 2/9 × 2 = 84/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
3/18 = 3 × 1/18 × 1 = 3/18 - Subtract the two like fractions:
84/18 - 3/18 = 84 - 3/18 = 81/18 - After reducing the fraction, the answer is 9/2
- In mixed form: 41/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/9-3/18 42/9-6/18 42/18-3/18 42/9-3/36 42/9-9/18 42/27-3/18 42/9-3/54 42/9-15/18 42/45-3/18 42/9-3/90 42/9-21/18 42/63-3/18