Observe the angle shown in the image.

The angle marked $K^\circ$ is smaller than a right angle ($90^\circ$).

An angle that measures less than $90^\circ$ is called an acute angle.
The name of the angle is $\boxed{\text{Acute angle}}$.

8. Ochieng scored 80% in a Mathematics test. What is this written as a fraction in its simplest form? (2 marks)

A percentage means "out of 100", so $80\%$ can be written as $\frac{80}{100}$.

Both 80 and 100 are divisible by 20.

The fraction in its simplest form is $\boxed{\frac{4}{5}}$.