Question

2. Bottle A is full of water. Bottle B holds 16 ounces of water when full. When the contents of bottle A are poured into bottle B, bottle B is full of water. How many ounces of water can bottle A hold when full?​

Answer 1

4A = 3(16)
5 4

The proportion above says the same thing that the word problem does. 4/5 of A is the same as 3/4 of B (which is 16 oz).

If you cross multiply and reduce…

16A = 240
A = 15