Add 12/5 and 75/81
1st number: 2 2/5, 2nd number: 75/81
12/5 + 75/81 is 449/135.
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,
12/5 = 12 × 81/5 × 81 = 972/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
75/81 = 75 × 5/81 × 5 = 375/405 - Add the two like fractions:
972/405 + 375/405 = 972 + 375/405 = 1347/405 - 1347/405 simplified gives 449/135
- So, 12/5 + 75/81 = 449/135
In mixed form: 344/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/5+75/81 12/10+75/81 36/5+75/81 12/15+75/81 60/5+75/81 12/25+75/81 84/5+75/81 12/35+75/81