It's 77.472 , but since you probably need too round it will be 77.5
(9+8+2)/(4+9+8+2)=19/23=82%
Therefore very likely
Answer:
R = 
Step-by-step explanation:
I =
( multiply both sides by 100 to clear the fraction )
100I = PRT ( isolate R by dividing both sides by PT )
= R