It is 102.5. You made it kind of confusing at first by putting the divisor first in your question then putting your dividend, but I understand what you meant.
This answer would be false srry if im wrong but thats what i think
Answer:
(a) 
Multiplicative inverse of w will be 
(B) As w is same as the product of 
So there multiplicative inverse will also be same
Step-by-step explanation:
We have given two complex numbers
and 
(a) First we have to find 
So 
As we know that 
So 
Multiplicative inverse :
It is that number when multiply with the number which we have have to find the multiplicative inverse gives result as 1
So multiplicative inverse of w will be 
Because when we multiply
with
it gives result as 1
(b) As w is same as the product of 
So there multiplicative inverse will also be same
Answer:
-9/20 with the given information i believe this is the answer