Explain the steps to find 63 is 90% of what number?

First you are going to put 63 over x (63/x) then you are going to put 90 over 100 (90/100). Then you are going to put them so that they equal each other (63/x = 90/100) and cross multiply so that it looks like this: 6,300 = 90x. then you are going o divide 6,300 by 90 which is 70. so 63 is 90% of 70.

90% of 70 = 63, so 70 is the answer. Thanks for your question! Don't forget to rate and give me the brainliest answer! Then, I can help you with all your problems! ^-^ ~

Im sorry but what on

Polar coordinates is 8,9