It is a very simple question.
In 1, three vertical lines were occupying the top space in the diamond. In the lower half of the diamond, half the space was shaded and the other half was unshaded.
In 2, two vertical lines were occupying the top space in the diamond. In the lower half of the diamond, all of the space was shaded.
There was hence a net loss of ...
There are quite a few factors to consider when taking an assessment. For one, the external conditions of your environment, and your internal mindset should ideally be standardised.
An example of external standardised conditions are a consistent room temperature, a quite space to take the test, or an external examiner to check that no one cheats.