-89.66% is the change from 619 to 64
Calculation steps:
[( 64 - 619 ) ÷ 619] x 100 = -89.66%
Formula
Percentage change = [(64 - 619) / 619] x 100
Subtract the new number by the original number
64 - 619 = -555
-555 ÷ 619 = -0.8966074313408724
-0.8966074313408724 x 100 = -89.66%