Subtract 27/84 from 4/42
4/42 - 27/84 is -19/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
4/42 = 4 × 2/42 × 2 = 8/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
27/84 = 27 × 1/84 × 1 = 27/84 - Subtract the two like fractions:
8/84 - 27/84 = 8 - 27/84 = -19/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/42-27/84 4/42-54/84 4/84-27/84 12/42-27/84 4/42-81/84 20/42-27/84 28/42-27/84