Subtract 27/28 from 1/84
1/84 - 27/28 is -20/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
1/84 = 1 × 1/84 × 1 = 1/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
27/28 = 27 × 3/28 × 3 = 81/84 - Subtract the two like fractions:
1/84 - 81/84 = 1 - 81/84 = -80/84 - After reducing the fraction, the answer is -20/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/84-27/28 1/84-54/28 1/84-27/56 3/84-27/28 1/84-81/28 1/84-27/84 5/84-27/28 7/84-27/28