Add 90/42 and 18/54
1st number: 2 6/42, 2nd number: 18/54
90/42 + 18/54 is 52/21.
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,
90/42 = 90 × 9/42 × 9 = 810/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
18/54 = 18 × 7/54 × 7 = 126/378 - Add the two like fractions:
810/378 + 126/378 = 810 + 126/378 = 936/378 - 936/378 simplified gives 52/21
- So, 90/42 + 18/54 = 52/21
In mixed form: 210/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42+36/54 90/84+18/54 90/42+90/54