To find out the answer we need to find out two percentages. Formula is:
[tex]Increase percentage = \frac{increase}{amount before increase}[/tex]
First increase is:
[tex]Increase percentage = \frac{5}{20} \\Increase percentage = \frac{1}{4} \\Increase percentage = 0.25\\[/tex]
Second increase is:
[tex]Increase percentage = \frac{8}{25} \\Increase percentage = 0.32\\[/tex]
This is 25% and 32%.
Difference = 32%-25%=7%
So, the second raise was 7% greater than first one.