# PLEASE HELP?! (Math Word Problem)

Rob spent 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.

A. (h/0.25)1.25

B. 4h

C. 5h

D. 1.25h

E. (1+25/100)h

*I already know the answer (C,E) but I have a hard time knowing the steps to get to those answers, like for example, Khan Academy explains it by the following;

So my series of questions are:

1. How do you get h/25% in step one, like why divide?

2. In step 4, how do they get 5h to .25/.25(5h)?

3. Maybe someone can explain each step more thoroughly and why?

Would really appreciate the help, Thanks :)

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