Bro
The maths is not about adding and subtracting,it’s about volume for sure but I do not recall something related to ratio and units.
There were some examples with percentages aswell but unfortunately I wouldn’t be able to give any further assistance as Maths have always been my weakest point.
Regarding verbal reasoning could you be more specific so I could help you and the other guys more?
What I am trying to say is that as I am getting older and my memory is becoming worse plus the fact that English is not my mother tongue I do not recall which topic is that. If it suits you best send me a PM,in fact if anyone wants to ask something feel free to do so too.