-89.13% is the change from 607 to 66
Calculation steps:
[( 66 - 607 ) ÷ 607] x 100 = -89.13%
Formula
Percentage change = [(66 - 607) / 607] x 100
Subtract the new number by the original number
66 - 607 = -541
-541 ÷ 607 = -0.8912685337726524
-0.8912685337726524 x 100 = -89.13%