-6.37% is the change from 502 to 470
Calculation steps:
[( 470 - 502 ) ÷ 502] x 100 = -6.37%
Formula
Percentage change = [(470 - 502) / 502] x 100
Subtract the new number by the original number
470 - 502 = -32
-32 ÷ 502 = -0.06374501992031872
-0.06374501992031872 x 100 = -6.37%