-42.91% is the change from 557 to 318
Calculation steps:
[( 318 - 557 ) ÷ 557] x 100 = -42.91%
Formula
Percentage change = [(318 - 557) / 557] x 100
Subtract the new number by the original number
318 - 557 = -239
-239 ÷ 557 = -0.42908438061041293
-0.42908438061041293 x 100 = -42.91%