-78% is the change from 809 to 178
Calculation steps:
[( 178 - 809 ) ÷ 809] x 100 = -78%
Formula
Percentage change = [(178 - 809) / 809] x 100
Subtract the new number by the original number
178 - 809 = -631
-631 ÷ 809 = -0.7799752781211372
-0.7799752781211372 x 100 = -78%