-65.42% is the change from 509 to 176
Calculation steps:
[( 176 - 509 ) ÷ 509] x 100 = -65.42%
Formula
Percentage change = [(176 - 509) / 509] x 100
Subtract the new number by the original number
176 - 509 = -333
-333 ÷ 509 = -0.6542239685658153
-0.6542239685658153 x 100 = -65.42%