20 x 8.55= 171 that is what tracy was making per week. 8.55 + 1.30= 9.85 is her raise 20 x 9.85= 197 is how much she making with her new raise per week. now to figure out how much MORE she is making go 197 - 171=$26 is your final answer
if there were 100 questions then 76 were correct, and 24 incorrect, you can simplify and rearrange the fraction depending on how many questions there were,