-30.38% is the change from 800 to 557
Calculation steps:
[( 557 - 800 ) ÷ 800] x 100 = -30.38%
Formula
Percentage change = [(557 - 800) / 800] x 100
Subtract the new number by the original number
557 - 800 = -243
-243 ÷ 800 = -0.30375
-0.30375 x 100 = -30.38%