Add 81/36 and 28/7
1st number: 2 9/36, 2nd number: 4 0/7
81/36 + 28/7 is 25/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 7 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
81/36 = 81 × 7/36 × 7 = 567/252 - Likewise, for the 2nd fraction, since 7 × 36 = 252,
28/7 = 28 × 36/7 × 36 = 1008/252 - Add the two like fractions:
567/252 + 1008/252 = 567 + 1008/252 = 1575/252 - 1575/252 simplified gives 25/4
- So, 81/36 + 28/7 = 25/4
In mixed form: 61/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/36+56/7 81/72+28/7 81/36+28/14 81/36+84/7 81/36+28/21 81/36+28/35 81/36+28/49