Add 5/42 and 15/54
5/42 + 15/54 is 25/63.
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,
15/54 = 15 × 7/54 × 7 = 105/378 - Add the two like fractions:
45/378 + 105/378 = 45 + 105/378 = 150/378 - 150/378 simplified gives 25/63
- So, 5/42 + 15/54 = 25/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/42+15/54 5/42+30/54 5/84+15/54 15/42+15/54 5/42+45/54 25/42+15/54 5/42+75/54 35/42+15/54