Add 18/42 and 49/54
18/42 + 49/54 is 505/378.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 54 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 54 × 7 = 378,
49/54 = 49 × 7/54 × 7 = 343/378 - Add the two like fractions:
162/378 + 343/378 = 162 + 343/378 = 505/378 - So, 18/42 + 49/54 = 505/378
In mixed form: 1127/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/42+49/54 18/42+98/54 18/84+49/54 54/42+49/54 90/42+49/54