-80.77% is the change from 806 to 155
Calculation steps:
[( 155 - 806 ) ÷ 806] x 100 = -80.77%
Formula
Percentage change = [(155 - 806) / 806] x 100
Subtract the new number by the original number
155 - 806 = -651
-651 ÷ 806 = -0.8076923076923077
-0.8076923076923077 x 100 = -80.77%