I think You did it right !
Answer:
28% decrease
Step-by-step explanation:
Percentage Decrease=
(Starting Value − Final Value) / Starting Value x 100
(850 - 612) / 850 x 100 = .28
None of above is the answer
They are both decimals, and value in the average place values: .04 is 4 hundred, and .004 is 4 thousand. Also, .04 is 10 times greater than .004.