-19.07% is the change from 818 to 662
Calculation steps:
[( 662 - 818 ) ÷ 818] x 100 = -19.07%
Formula
Percentage change = [(662 - 818) / 818] x 100
Subtract the new number by the original number
662 - 818 = -156
-156 ÷ 818 = -0.19070904645476772
-0.19070904645476772 x 100 = -19.07%