-18.79% is the change from 809 to 657
Calculation steps:
[( 657 - 809 ) ÷ 809] x 100 = -18.79%
Formula
Percentage change = [(657 - 809) / 809] x 100
Subtract the new number by the original number
657 - 809 = -152
-152 ÷ 809 = -0.18788627935723115
-0.18788627935723115 x 100 = -18.79%