Add 5/15 and 12/81
5/15 + 12/81 is 13/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 15 × 27 = 405,
5/15 = 5 × 27/15 × 27 = 135/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
12/81 = 12 × 5/81 × 5 = 60/405 - Add the two like fractions:
135/405 + 60/405 = 135 + 60/405 = 195/405 - 195/405 simplified gives 13/27
- So, 5/15 + 12/81 = 13/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/15+12/81 5/15+24/81 5/30+12/81 5/15+36/81 5/45+12/81 25/15+12/81 5/15+60/81 5/75+12/81 35/15+12/81 5/15+84/81