Ashop sells newspapers for a profit of 0.5%. his sales for the month of january were $8341.50. how much of this is profit?

Amount of sales  of newspapers for the month of January = $8341.50
Percentage of profit for which the newspaper is sold = 0.5%
Then
Amount of profit made in the month of January = 0.5% * 8341.50 dollars
                                                                           = (0.5/100) * 8341.50 dollars
                                                                           = 4170.75/100 dollars
                                                                           = 41.707 dollars
                                                                           = 41.71 dollars
So the shop makes a profit of $41.71 in the month of January by selling newspapers worth $8341.50. I hope the procedure is perfectly clear for you to understand.

I believe it would be -9/5 cuz the slope of the line perpendicular to the other is the negative reciprocal of the other line. So flip 5/9 and make it negative. SO THE ANSWER IS -9/5
Hope this helped :)