Add 18/81 and 5/42
18/81 + 5/42 is 43/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 42 is 1134
Next, find the equivalent fraction of both fractional numbers with denominator 1134 - For the 1st fraction, since 81 × 14 = 1134,
18/81 = 18 × 14/81 × 14 = 252/1134 - Likewise, for the 2nd fraction, since 42 × 27 = 1134,
5/42 = 5 × 27/42 × 27 = 135/1134 - Add the two like fractions:
252/1134 + 135/1134 = 252 + 135/1134 = 387/1134 - 387/1134 simplified gives 43/126
- So, 18/81 + 5/42 = 43/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/81+5/42 18/81+10/42 18/81+5/84 54/81+5/42 18/81+15/42 90/81+5/42 18/81+25/42 18/81+35/42