Add 81/84 and 70/9
1st number: 81/84, 2nd number: 7 7/9
81/84 + 70/9 is 2203/252.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 9 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
81/84 = 81 × 3/84 × 3 = 243/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
70/9 = 70 × 28/9 × 28 = 1960/252 - Add the two like fractions:
243/252 + 1960/252 = 243 + 1960/252 = 2203/252 - So, 81/84 + 70/9 = 2203/252
In mixed form: 8187/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/84+70/18 81/84+70/27 81/84+70/45 81/84+70/63