Add 45/90 and 2/81
45/90 + 2/81 is 85/162.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 90 × 9 = 810,
45/90 = 45 × 9/90 × 9 = 405/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
2/81 = 2 × 10/81 × 10 = 20/810 - Add the two like fractions:
405/810 + 20/810 = 405 + 20/810 = 425/810 - 425/810 simplified gives 85/162
- So, 45/90 + 2/81 = 85/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 45/90+4/81 45/90+6/81 45/90+10/81 45/90+14/81