-34.77% is the change from 509 to 332
Calculation steps:
[( 332 - 509 ) ÷ 509] x 100 = -34.77%
Formula
Percentage change = [(332 - 509) / 509] x 100
Subtract the new number by the original number
332 - 509 = -177
-177 ÷ 509 = -0.3477406679764244
-0.3477406679764244 x 100 = -34.77%