I don't understand this math please help me...

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose