Subtract 12/27 from 84/42
1st number: 2 0/42, 2nd number: 12/27
84/42 - 12/27 is 14/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 27 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
84/42 = 84 × 9/42 × 9 = 756/378 - Likewise, for the 2nd fraction, since 27 × 14 = 378,
12/27 = 12 × 14/27 × 14 = 168/378 - Subtract the two like fractions:
756/378 - 168/378 = 756 - 168/378 = 588/378 - After reducing the fraction, the answer is 14/9
- In mixed form: 15/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42-24/27 84/42-12/54 84/42-36/27 84/42-12/81 84/42-60/27 84/42-84/27