Add 70/20 and 9/81
1st number: 3 10/20, 2nd number: 9/81
70/20 + 9/81 is 65/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
70/20 = 70 × 81/20 × 81 = 5670/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
9/81 = 9 × 20/81 × 20 = 180/1620 - Add the two like fractions:
5670/1620 + 180/1620 = 5670 + 180/1620 = 5850/1620 - 5850/1620 simplified gives 65/18
- So, 70/20 + 9/81 = 65/18
In mixed form: 311/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20+18/81 70/40+9/81 70/20+27/81 70/60+9/81 70/20+45/81 70/20+63/81