Add 75/45 and 20/81
1st number: 1 30/45, 2nd number: 20/81
75/45 + 20/81 is 155/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 45 × 9 = 405,
75/45 = 75 × 9/45 × 9 = 675/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
20/81 = 20 × 5/81 × 5 = 100/405 - Add the two like fractions:
675/405 + 100/405 = 675 + 100/405 = 775/405 - 775/405 simplified gives 155/81
- So, 75/45 + 20/81 = 155/81
In mixed form: 174/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/45+40/81 75/90+20/81 75/45+60/81