Subtract 36/42 from 27/84
27/84 - 36/42 is -15/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
27/84 = 27 × 1/84 × 1 = 27/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
36/42 = 36 × 2/42 × 2 = 72/84 - Subtract the two like fractions:
27/84 - 72/84 = 27 - 72/84 = -45/84 - After reducing the fraction, the answer is -15/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/84-36/42 27/84-72/42 27/84-36/84 81/84-36/42