-79.43% is the change from 807 to 166
Calculation steps:
[( 166 - 807 ) ÷ 807] x 100 = -79.43%
Formula
Percentage change = [(166 - 807) / 807] x 100
Subtract the new number by the original number
166 - 807 = -641
-641 ÷ 807 = -0.7942998760842627
-0.7942998760842627 x 100 = -79.43%