-65.6% is the change from 500 to 172
Calculation steps:
[( 172 - 500 ) ÷ 500] x 100 = -65.6%
Formula
Percentage change = [(172 - 500) / 500] x 100
Subtract the new number by the original number
172 - 500 = -328
-328 ÷ 500 = -0.656
-0.656 x 100 = -65.6%