Add 20/84 and 1/81
20/84 + 1/81 is 142/567.
Steps for adding 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,
20/84 = 20 × 27/84 × 27 = 540/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
1/81 = 1 × 28/81 × 28 = 28/2268 - Add the two like fractions:
540/2268 + 28/2268 = 540 + 28/2268 = 568/2268 - 568/2268 simplified gives 142/567
- So, 20/84 + 1/81 = 142/567
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/84+1/81 20/84+2/81 60/84+1/81 20/84+3/81 20/84+5/81 20/84+7/81