-14.34% is the change from 509 to 436
Calculation steps:
[( 436 - 509 ) ÷ 509] x 100 = -14.34%
Formula
Percentage change = [(436 - 509) / 509] x 100
Subtract the new number by the original number
436 - 509 = -73
-73 ÷ 509 = -0.14341846758349705
-0.14341846758349705 x 100 = -14.34%