-17.55% is the change from 809 to 667
Calculation steps:
[( 667 - 809 ) ÷ 809] x 100 = -17.55%
Formula
Percentage change = [(667 - 809) / 809] x 100
Subtract the new number by the original number
667 - 809 = -142
-142 ÷ 809 = -0.17552533992583436
-0.17552533992583436 x 100 = -17.55%