Subtract 10/81 from 27/84
27/84 - 10/81 is 449/2268.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 81 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 84 × 27 = 2268,
27/84 = 27 × 27/84 × 27 = 729/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
10/81 = 10 × 28/81 × 28 = 280/2268 - Subtract the two like fractions:
729/2268 - 280/2268 = 729 - 280/2268 = 449/2268
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/84-10/81 27/84-20/81 81/84-10/81 27/84-30/81 27/84-50/81 27/84-70/81