Math
posted by Sherkyra8645 .
1). In 1968, vehicle emision standards allowed 6.3 hydrocarbons released per mile driven. By 1980, the standards allowed only 0.41 hydrocarbons per mile driven. What was the rate of change from 1968 to 1980?

Math 
Ms. Sue
(6.3  0.41) / 6.3 =
Convert the decimal answer to a percent. 
Math 
Sherkyra8645
Thank you! Would it be...
0.93? 
Math 
Ms. Sue
Yes  if you change the decimal to a percent.
0.93 = 93% decrease
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