Add 42/84 and 27/18
1st number: 42/84, 2nd number: 1 9/18
42/84 + 27/18 is 2/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 18 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
42/84 = 42 × 3/84 × 3 = 126/252 - Likewise, for the 2nd fraction, since 18 × 14 = 252,
27/18 = 27 × 14/18 × 14 = 378/252 - Add the two like fractions:
126/252 + 378/252 = 126 + 378/252 = 504/252 - 504/252 simplified gives 2/1
- So, 42/84 + 27/18 = 2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84+54/18 42/84+27/36 42/84+81/18 42/84+27/54 42/84+27/90