Add 12/84 and 18/81
12/84 + 18/81 is 23/63.
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,
12/84 = 12 × 27/84 × 27 = 324/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
18/81 = 18 × 28/81 × 28 = 504/2268 - Add the two like fractions:
324/2268 + 504/2268 = 324 + 504/2268 = 828/2268 - 828/2268 simplified gives 23/63
- So, 12/84 + 18/81 = 23/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/84+18/81 12/84+36/81 36/84+18/81 12/84+54/81 60/84+18/81 12/84+90/81