-12.57% is the change from 509 to 445
Calculation steps:
[( 445 - 509 ) ÷ 509] x 100 = -12.57%
Formula
Percentage change = [(445 - 509) / 509] x 100
Subtract the new number by the original number
445 - 509 = -64
-64 ÷ 509 = -0.12573673870333987
-0.12573673870333987 x 100 = -12.57%