Add 35/45 and 20/81
35/45 + 20/81 is 83/81.
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,
35/45 = 35 × 9/45 × 9 = 315/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
20/81 = 20 × 5/81 × 5 = 100/405 - Add the two like fractions:
315/405 + 100/405 = 315 + 100/405 = 415/405 - 415/405 simplified gives 83/81
- So, 35/45 + 20/81 = 83/81
In mixed form: 12/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/45+20/81 35/45+40/81 35/90+20/81 35/45+60/81