The problem requires calculating the difference between two numbers: $4$ and $1.15$. The expression to evaluate is $4 - 1.15$.

1. Problem Description

The problem requires calculating the difference between two numbers: $4$ and $1.15$. The expression to evaluate is $4 - 1.15$.

2. Solution Steps

To subtract $1.15$ from $4$, we can rewrite $4$ as $4.00$. Then, we subtract $1.15$ from $4.00$.

$4.00 - 1.15$

We can perform the subtraction as follows:

$0 - 5$: We need to borrow $1$ from the tenths place.

We borrow $1$ from the ones place to make the tenths place $10$, and then borrow $1$ from the tenths place to make the hundredths place $10$. So we have $10 - 5 = 5$ in the hundredths place.

Now we have $9$ in the tenths place. $9 - 1 = 8$ in the tenths place.

We borrowed $1$ from the ones place, so we now have $3$ in the ones place. $3 - 1 = 2$ in the ones place.

Thus, we have $2.85$.

3. Final Answer

$2.85$