Add 84/28 and 81/36
1st number: 3 0/28, 2nd number: 2 9/36
84/28 + 81/36 is 21/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
84/28 = 84 × 9/28 × 9 = 756/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
81/36 = 81 × 7/36 × 7 = 567/252 - Add the two like fractions:
756/252 + 567/252 = 756 + 567/252 = 1323/252 - 1323/252 simplified gives 21/4
- So, 84/28 + 81/36 = 21/4
In mixed form: 51/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/56+81/36 84/28+81/72