-89.42% is the change from 624 to 66
Calculation steps:
[( 66 - 624 ) ÷ 624] x 100 = -89.42%
Formula
Percentage change = [(66 - 624) / 624] x 100
Subtract the new number by the original number
66 - 624 = -558
-558 ÷ 624 = -0.8942307692307693
-0.8942307692307693 x 100 = -89.42%