-12.56% is the change from 645 to 564
Calculation steps:
[( 564 - 645 ) ÷ 645] x 100 = -12.56%
Formula
Percentage change = [(564 - 645) / 645] x 100
Subtract the new number by the original number
564 - 645 = -81
-81 ÷ 645 = -0.12558139534883722
-0.12558139534883722 x 100 = -12.56%