Add 70/30 and 15/81
1st number: 2 10/30, 2nd number: 15/81
70/30 + 15/81 is 68/27.
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,
70/30 = 70 × 27/30 × 27 = 1890/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
15/81 = 15 × 10/81 × 10 = 150/810 - Add the two like fractions:
1890/810 + 150/810 = 1890 + 150/810 = 2040/810 - 2040/810 simplified gives 68/27
- So, 70/30 + 15/81 = 68/27
In mixed form: 214/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/30+30/81 70/60+15/81 70/30+45/81 70/90+15/81 70/30+75/81