-31.49% is the change from 813 to 557
Calculation steps:
[( 557 - 813 ) ÷ 813] x 100 = -31.49%
Formula
Percentage change = [(557 - 813) / 813] x 100
Subtract the new number by the original number
557 - 813 = -256
-256 ÷ 813 = -0.3148831488314883
-0.3148831488314883 x 100 = -31.49%