At the neighborhood Fourth of July party, Mrs. O'Conner plans to serve banana pudding. She plans to make two batches for every 9 people attending. If 72 people will attend the Fourth of July party, how many batches does Mrs. O'Conner need to make?

16 batches are to be made for the party.

Explanation:

Given:

Number of batches for every 9 people = 2

Total number of people attending the party=72

To Find:

The Number of batches required=?

Solution:

Let the number of batches for 72 people be n

So, by cross multiplication method,

2 x 72 = n x 9

9n = 72 x 2

n = 8 x 2

n = 16