-9.69% is the change from 557 to 503
Calculation steps:
[( 503 - 557 ) ÷ 557] x 100 = -9.69%
Formula
Percentage change = [(503 - 557) / 557] x 100
Subtract the new number by the original number
503 - 557 = -54
-54 ÷ 557 = -0.09694793536804308
-0.09694793536804308 x 100 = -9.69%