Subtract 27/42 from 1/3
1/3 - 27/42 is -13/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 3 × 14 = 42,
1/3 = 1 × 14/3 × 14 = 14/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
27/42 = 27 × 1/42 × 1 = 27/42 - Subtract the two like fractions:
14/42 - 27/42 = 14 - 27/42 = -13/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/3-27/42 1/3-54/42 1/6-27/42 1/3-27/84 1/3-81/42 1/9-27/42 5/3-27/42 1/15-27/42 7/3-27/42 1/21-27/42