-88.15% is the change from 557 to 66
Calculation steps:
[( 66 - 557 ) ÷ 557] x 100 = -88.15%
Formula
Percentage change = [(66 - 557) / 557] x 100
Subtract the new number by the original number
66 - 557 = -491
-491 ÷ 557 = -0.881508078994614
-0.881508078994614 x 100 = -88.15%