-58% is the change from 500 to 210
Calculation steps:
[( 210 - 500 ) ÷ 500] x 100 = -58%
Formula
Percentage change = [(210 - 500) / 500] x 100
Subtract the new number by the original number
210 - 500 = -290
-290 ÷ 500 = -0.58
-0.58 x 100 = -58%
Example