115% profit on 625 divided by 90 (its a fraction with 90 on the bottom)

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years

In which form is the following function written? y = - 2(x – 3)(x + 5)

How do i take any fraction and make it into a decimal or percentage?