Add 27/84 and 15/20
27/84 + 15/20 is 15/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
27/84 = 27 × 5/84 × 5 = 135/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
15/20 = 15 × 21/20 × 21 = 315/420 - Add the two like fractions:
135/420 + 315/420 = 135 + 315/420 = 450/420 - 450/420 simplified gives 15/14
- So, 27/84 + 15/20 = 15/14
In mixed form: 11/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/84+15/20 27/84+30/20 27/84+15/40 81/84+15/20 27/84+45/20 27/84+15/60 27/84+75/20