Answer:

Step-by-step explanation:
Let's use a start by using common denominators.
and 
Now, replace the original equation with the common denominators. 
Solve! 
Change in value= new price-original price
Change in value=850-10000
Change in value= -9150
%decreased=change in value/original price x 100
%decreased= 9150/10000x100
The answer is 91.5%
Answer:
Step-by-step explanation:
100 + 100÷100 - 100 = 100 + 1 -100 {apply BODMAS}
= 101 - 100 = 1
oh ok alr thank you so much