Subtract 3/4 from 42/18
1st number: 2 6/18, 2nd number: 3/4
42/18 - 3/4 is 19/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 4 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 18 × 2 = 36,
42/18 = 42 × 2/18 × 2 = 84/36 - Likewise, for the 2nd fraction, since 4 × 9 = 36,
3/4 = 3 × 9/4 × 9 = 27/36 - Subtract the two like fractions:
84/36 - 27/36 = 84 - 27/36 = 57/36 - After reducing the fraction, the answer is 19/12
- In mixed form: 17/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18-3/4 42/18-6/4 42/36-3/4 42/18-3/8 42/18-9/4 42/54-3/4 42/18-3/12 42/18-15/4 42/90-3/4 42/18-3/20 42/18-21/4 42/18-3/28