-8.62% is the change from 557 to 509
Calculation steps:
[( 509 - 557 ) ÷ 557] x 100 = -8.62%
Formula
Percentage change = [(509 - 557) / 557] x 100
Subtract the new number by the original number
509 - 557 = -48
-48 ÷ 557 = -0.08617594254937164
-0.08617594254937164 x 100 = -8.62%