In a full 30 - gallon drum, `15%` of the water evaporated. How much water is remaining?

Answer

To find out how much water is remaining in a 30-gallon drum after 15% of it has evaporated, we can follow these steps:

### Step 1: Determine the initial amount of water
The drum is initially full with 30 gallons of water.

### Step 2: Calculate the amount of water that evaporated
To find out how much water evaporated, we need to calculate 15% of 30 gallons.

\[ \text{Amount evaporated} = \frac{15}{100} \times 30 \]

### Step 3: Perform the calculation
Calculating the above expression:

\[ \text{Amount evaporated} = 0.15 \times 30 = 4.5 \text{ gallons} \]

### Step 4: Calculate the remaining amount of water
Now, we subtract the amount that evaporated from the initial amount of water:

\[ \text{Remaining water} = \text{Initial amount} - \text{Amount evaporated} \]

\[ \text{Remaining water} = 30 - 4.5 \]

### Step 5: Perform the final calculation
Calculating the remaining water:

\[ \text{Remaining water} = 25.5 \text{ gallons} \]

### Final Answer
The amount of water remaining in the drum is **25.5 gallons**.

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