-90.8% is the change from 609 to 56
Calculation steps:
[( 56 - 609 ) ÷ 609] x 100 = -90.8%
Formula
Percentage change = [(56 - 609) / 609] x 100
Subtract the new number by the original number
56 - 609 = -553
-553 ÷ 609 = -0.9080459770114943
-0.9080459770114943 x 100 = -90.8%