-90.84% is the change from 557 to 51
Calculation steps:
[( 51 - 557 ) ÷ 557] x 100 = -90.84%
Formula
Percentage change = [(51 - 557) / 557] x 100
Subtract the new number by the original number
51 - 557 = -506
-506 ÷ 557 = -0.9084380610412927
-0.9084380610412927 x 100 = -90.84%