-9.75% is the change from 564 to 509
Calculation steps:
[( 509 - 564 ) ÷ 564] x 100 = -9.75%
Formula
Percentage change = [(509 - 564) / 564] x 100
Subtract the new number by the original number
509 - 564 = -55
-55 ÷ 564 = -0.0975177304964539
-0.0975177304964539 x 100 = -9.75%