-54.94% is the change from 557 to 251
Calculation steps:
[( 251 - 557 ) ÷ 557] x 100 = -54.94%
Formula
Percentage change = [(251 - 557) / 557] x 100
Subtract the new number by the original number
251 - 557 = -306
-306 ÷ 557 = -0.5493716337522442
-0.5493716337522442 x 100 = -54.94%