Answer:
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 Â
So, by cross multiplication method, Â
2 x 72 = n x 9 Â
9n = 72 x 2 Â
n = 8 x 2 Â
n = 16 Â