Add 7/30 and 15/81
7/30 + 15/81 is 113/270.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 30 × 27 = 810,
7/30 = 7 × 27/30 × 27 = 189/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
15/81 = 15 × 10/81 × 10 = 150/810 - Add the two like fractions:
189/810 + 150/810 = 189 + 150/810 = 339/810 - 339/810 simplified gives 113/270
- So, 7/30 + 15/81 = 113/270
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/30+15/81 7/30+30/81 7/60+15/81 21/30+15/81 7/30+45/81 7/90+15/81 35/30+15/81 7/30+75/81 49/30+15/81