The problem asks to identify which strip model represents 40%. Each strip model is divided into 5 equal parts.

1. Problem Description

The problem asks to identify which strip model represents 40%. Each strip model is divided into 5 equal parts.

2. Solution Steps

To find the model that represents 40%, we need to determine how many parts out of 5 should be shaded.

First, we can convert 40% to a fraction:

$40\% = \frac{40}{100}$

We can simplify this fraction by dividing both the numerator and the denominator by their greatest common divisor, which is 20:

$\frac{40}{100} = \frac{40 \div 20}{100 \div 20} = \frac{2}{5}$

So, 40% is equivalent to $\frac{2}{5}$.

Now, we examine each strip model:

- The first strip model has 2 out of 5 parts shaded.

- The second strip model has 1 out of 5 parts shaded.

- The third strip model has 1 out of 5 parts shaded.

Since $\frac{2}{5}$ of the strip must be shaded to represent 40%, the first strip model shows 40%.

3. Final Answer

The first model shows 40%.