-89.34% is the change from 619 to 66
Calculation steps:
[( 66 - 619 ) ÷ 619] x 100 = -89.34%
Formula
Percentage change = [(66 - 619) / 619] x 100
Subtract the new number by the original number
66 - 619 = -553
-553 ÷ 619 = -0.8933764135702746
-0.8933764135702746 x 100 = -89.34%