What is 15/27 in simplest form

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

Aconstruction worker needs to put a rectangular window in the side of a building he knows from measuring that the top and bottom of the window have a width of 8bfeet and the sides have a length of 15 feet he also measured one diagonal to be 17 feet what is the length of the other diagonal

How do you find percent change? ? i will give brainliest for the bestme i don’t understand