-91.22% is the change from 581 to 51
Calculation steps:
[( 51 - 581 ) ÷ 581] x 100 = -91.22%
Formula
Percentage change = [(51 - 581) / 581] x 100
Subtract the new number by the original number
51 - 581 = -530
-530 ÷ 581 = -0.9122203098106713
-0.9122203098106713 x 100 = -91.22%