-75.19% is the change from 665 to 165
Calculation steps:
[( 165 - 665 ) ÷ 665] x 100 = -75.19%
Formula
Percentage change = [(165 - 665) / 665] x 100
Subtract the new number by the original number
165 - 665 = -500
-500 ÷ 665 = -0.7518796992481203
-0.7518796992481203 x 100 = -75.19%