Subtract 18/42 from 27/12
1st number: 2 3/12, 2nd number: 18/42
27/12 - 18/42 is 51/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
27/12 = 27 × 7/12 × 7 = 189/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
18/42 = 18 × 2/42 × 2 = 36/84 - Subtract the two like fractions:
189/84 - 36/84 = 189 - 36/84 = 153/84 - After reducing the fraction, the answer is 51/28
- In mixed form: 123/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/12-18/42 27/12-36/42 27/24-18/42 27/12-18/84 81/12-18/42 27/12-54/42 27/36-18/42 27/12-90/42 27/60-18/42 27/84-18/42