-90.99% is the change from 566 to 51
Calculation steps:
[( 51 - 566 ) ÷ 566] x 100 = -90.99%
Formula
Percentage change = [(51 - 566) / 566] x 100
Subtract the new number by the original number
51 - 566 = -515
-515 ÷ 566 = -0.9098939929328622
-0.9098939929328622 x 100 = -90.99%