-79.11% is the change from 809 to 169
Calculation steps:
[( 169 - 809 ) ÷ 809] x 100 = -79.11%
Formula
Percentage change = [(169 - 809) / 809] x 100
Subtract the new number by the original number
169 - 809 = -640
-640 ÷ 809 = -0.7911001236093943
-0.7911001236093943 x 100 = -79.11%