-42.37% is the change from 557 to 321
Calculation steps:
[( 321 - 557 ) ÷ 557] x 100 = -42.37%
Formula
Percentage change = [(321 - 557) / 557] x 100
Subtract the new number by the original number
321 - 557 = -236
-236 ÷ 557 = -0.4236983842010772
-0.4236983842010772 x 100 = -42.37%