what is percent of change $50 to $65

You would do percent of change.

meaning you would subract 65 and 50 to get 15. then you would put 15 over 50 (as a fraction) then equals r/100. then you would cross multiply to get r.

orginal:50

new:65

65-50=15

15/50=r/100

15r=5000

then divide by 15 to get r