Add 18/42 and 45/27
1st number: 18/42, 2nd number: 1 18/27
18/42 + 45/27 is 44/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 27 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
18/42 = 18 × 9/42 × 9 = 162/378 - Likewise, for the 2nd fraction, since 27 × 14 = 378,
45/27 = 45 × 14/27 × 14 = 630/378 - Add the two like fractions:
162/378 + 630/378 = 162 + 630/378 = 792/378 - 792/378 simplified gives 44/21
- So, 18/42 + 45/27 = 44/21
In mixed form: 22/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/42+45/27 18/42+90/27 18/84+45/27 18/42+45/54 54/42+45/27 18/42+45/81 90/42+45/27