Add 27/45 and 81/42
1st number: 27/45, 2nd number: 1 39/42
27/45 + 81/42 is 177/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
27/45 = 27 × 14/45 × 14 = 378/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
81/42 = 81 × 15/42 × 15 = 1215/630 - Add the two like fractions:
378/630 + 1215/630 = 378 + 1215/630 = 1593/630 - 1593/630 simplified gives 177/70
- So, 27/45 + 81/42 = 177/70
In mixed form: 237/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/45+81/42 27/90+81/42 27/45+81/84 81/45+81/42