-90.64% is the change from 609 to 57
Calculation steps:
[( 57 - 609 ) ÷ 609] x 100 = -90.64%
Formula
Percentage change = [(57 - 609) / 609] x 100
Subtract the new number by the original number
57 - 609 = -552
-552 ÷ 609 = -0.9064039408866995
-0.9064039408866995 x 100 = -90.64%