Answer:
Total number of cups in package are 2400.
Explanation:
Given : An economy package of cups has 720 green cups.
And the green cups are 30% of the total package.
We have to find the number of total cups in the package.
Let the package contain x cups in total.
Given: green cups are 30% of the total package that is 30% of x,
Also , given package has 720 green cups.
Thus, 30% of x = 720

Solving for x, we have,

Thus, total number of cups in package are 2400.