The answer is 72 bags. How you solve the problem is you take your first value (which is present within your problem) and divide that number by your second value (also present within your problem).
So divide 18 by 0.25.
18 / 0.25 = 72
If this isn’t correct, then I’d suggestion multiplying the values. For example:
0.25 * 18 = 4.5
