Add 15/5 and 4/81
1st number: 3 0/5, 2nd number: 4/81
15/5 + 4/81 is 247/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 5 × 81 = 405,
15/5 = 15 × 81/5 × 81 = 1215/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
4/81 = 4 × 5/81 × 5 = 20/405 - Add the two like fractions:
1215/405 + 20/405 = 1215 + 20/405 = 1235/405 - 1235/405 simplified gives 247/81
- So, 15/5 + 4/81 = 247/81
In mixed form: 34/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/5+4/81 15/5+8/81 15/10+4/81 45/5+4/81 15/5+12/81 75/5+4/81 15/5+20/81 15/25+4/81 15/5+28/81 15/35+4/81