Answer:
x= 12
Step-by-step explanation:
have a great day
good luck on your assignment
18%, because 50 - 100, meaning 1 is 2% so 9x2 is 18
Let the prior percentage be 
If we add 11.7% to
, we get 51.3%.
That is
.
This is a linear equation in
, so we solve for x to obtain,


Therefore the prior percentage was 39.6%