Add 84/42 and 45/81
1st number: 2 0/42, 2nd number: 45/81
84/42 + 45/81 is 23/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 81 is 1134
Next, find the equivalent fraction of both fractional numbers with denominator 1134 - For the 1st fraction, since 42 × 27 = 1134,
84/42 = 84 × 27/42 × 27 = 2268/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
45/81 = 45 × 14/81 × 14 = 630/1134 - Add the two like fractions:
2268/1134 + 630/1134 = 2268 + 630/1134 = 2898/1134 - 2898/1134 simplified gives 23/9
- So, 84/42 + 45/81 = 23/9
In mixed form: 25/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42+90/81