If yesterday Tony drank 4% less than what he drank two days ago, then yesterday he drank 100% - 4% = 96% of what he drank two days ago.
Let X be the amount of water Tony drank two days ago.
So, 96% of X is equal to 48 ounces.
Therefore, 0.96X = 48.
To find X, we divide both sides of the equation by 0.96.
X = 48 / 0.96 = 50.
Therefore, Tony drank 50 ounces of water two days ago.
#### 50
The answer is: 50
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
Tony tries to drink more water, so he has been tracking how much water he drinks. Yesterday, he drank 48 ounces of water, which is 4% less than what he drank two days ago. How much water did Tony drink two days ago?

### Answer:
