Add 5/42 and 30/54
5/42 + 30/54 is 85/126.
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,
5/42 = 5 × 9/42 × 9 = 45/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
30/54 = 30 × 7/54 × 7 = 210/378 - Add the two like fractions:
45/378 + 210/378 = 45 + 210/378 = 255/378 - 255/378 simplified gives 85/126
- So, 5/42 + 30/54 = 85/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/42+30/54 5/42+60/54 5/84+30/54 15/42+30/54 5/42+90/54 25/42+30/54 35/42+30/54