-89.11% is the change from 606 to 66
Calculation steps:
[( 66 - 606 ) ÷ 606] x 100 = -89.11%
Formula
Percentage change = [(66 - 606) / 606] x 100
Subtract the new number by the original number
66 - 606 = -540
-540 ÷ 606 = -0.8910891089108911
-0.8910891089108911 x 100 = -89.11%