-7.66% is the change from 509 to 470
Calculation steps:
[( 470 - 509 ) ÷ 509] x 100 = -7.66%
Formula
Percentage change = [(470 - 509) / 509] x 100
Subtract the new number by the original number
470 - 509 = -39
-39 ÷ 509 = -0.07662082514734773
-0.07662082514734773 x 100 = -7.66%