-9.87% is the change from 557 to 502
Calculation steps:
[( 502 - 557 ) ÷ 557] x 100 = -9.87%
Formula
Percentage change = [(502 - 557) / 557] x 100
Subtract the new number by the original number
502 - 557 = -55
-55 ÷ 557 = -0.09874326750448834
-0.09874326750448834 x 100 = -9.87%