Add 70/18 and 5/81
1st number: 3 16/18, 2nd number: 5/81
70/18 + 5/81 is 320/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 18 × 9 = 162,
70/18 = 70 × 9/18 × 9 = 630/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
5/81 = 5 × 2/81 × 2 = 10/162 - Add the two like fractions:
630/162 + 10/162 = 630 + 10/162 = 640/162 - 640/162 simplified gives 320/81
- So, 70/18 + 5/81 = 320/81
In mixed form: 377/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/18+10/81 70/36+5/81 70/18+15/81 70/54+5/81 70/18+25/81 70/90+5/81 70/18+35/81