Add 30/81 and 15/30
30/81 + 15/30 is 47/54.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 30 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
30/81 = 30 × 10/81 × 10 = 300/810 - Likewise, for the 2nd fraction, since 30 × 27 = 810,
15/30 = 15 × 27/30 × 27 = 405/810 - Add the two like fractions:
300/810 + 405/810 = 300 + 405/810 = 705/810 - 705/810 simplified gives 47/54
- So, 30/81 + 15/30 = 47/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/81+15/30 30/81+15/60 90/81+15/30 30/81+45/30 30/81+15/90 30/81+75/30