-17% is the change from 806 to 669
Calculation steps:
[( 669 - 806 ) ÷ 806] x 100 = -17%
Formula
Percentage change = [(669 - 806) / 806] x 100
Subtract the new number by the original number
669 - 806 = -137
-137 ÷ 806 = -0.16997518610421836
-0.16997518610421836 x 100 = -17%