Add 81/84 and 2/7
81/84 + 2/7 is 5/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
81/84 = 81 × 1/84 × 1 = 81/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
2/7 = 2 × 12/7 × 12 = 24/84 - Add the two like fractions:
81/84 + 24/84 = 81 + 24/84 = 105/84 - 105/84 simplified gives 5/4
- So, 81/84 + 2/7 = 5/4
In mixed form: 11/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/84+4/7 81/84+2/14 81/84+6/7 81/84+2/21 81/84+10/7 81/84+2/35 81/84+14/7 81/84+2/49