Add 27/15 and 20/42
1st number: 1 12/15, 2nd number: 20/42
27/15 + 20/42 is 239/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
27/15 = 27 × 14/15 × 14 = 378/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
20/42 = 20 × 5/42 × 5 = 100/210 - Add the two like fractions:
378/210 + 100/210 = 378 + 100/210 = 478/210 - 478/210 simplified gives 239/105
- So, 27/15 + 20/42 = 239/105
In mixed form: 229/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/15+20/42 27/15+40/42 27/30+20/42 27/15+20/84 81/15+20/42 27/15+60/42 27/45+20/42 27/75+20/42