Answers: middle box: 1.32
middle right box: -3.3
bottom left: -0.5
bottom middle: 0.6
Explanation:
[Find out the middle box]
x


[Find out the box in the middle right]
x

[To Find out the bottom left box - divide each side by three]
x


[Bottom middle box]
x

General Rule:
x

x

Hope this helps :)