-90.24% is the change from 656 to 64
Calculation steps:
[( 64 - 656 ) ÷ 656] x 100 = -90.24%
Formula
Percentage change = [(64 - 656) / 656] x 100
Subtract the new number by the original number
64 - 656 = -592
-592 ÷ 656 = -0.9024390243902439
-0.9024390243902439 x 100 = -90.24%