-79.5% is the change from 805 to 165
Calculation steps:
[( 165 - 805 ) ÷ 805] x 100 = -79.5%
Formula
Percentage change = [(165 - 805) / 805] x 100
Subtract the new number by the original number
165 - 805 = -640
-640 ÷ 805 = -0.7950310559006211
-0.7950310559006211 x 100 = -79.5%