The price of a technology stock has dropped to $9.51 today. yesterday’s price was $9.58. find the percentage decrease. round your answer to the nearest tenth of a percent.

For this case what you should do is the following rule of three
 $ 9.58 ---> 100%
 $ 9.51 ---> x
 Then, clearing x we have:
 x = (9.51 / 9.58) * (100)=99.3
 Subtracting the result:
 100-99.3 = 0.7%
 
 the percentage decrease is 0.7%