Add 2/28 and 21/81
2/28 + 21/81 is 125/378.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 81 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 28 × 81 = 2268,
2/28 = 2 × 81/28 × 81 = 162/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
21/81 = 21 × 28/81 × 28 = 588/2268 - Add the two like fractions:
162/2268 + 588/2268 = 162 + 588/2268 = 750/2268 - 750/2268 simplified gives 125/378
- So, 2/28 + 21/81 = 125/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/28+21/81 2/28+42/81 2/56+21/81 6/28+21/81 2/28+63/81 2/84+21/81 10/28+21/81 14/28+21/81