-81.33% is the change from 809 to 151
Calculation steps:
[( 151 - 809 ) ÷ 809] x 100 = -81.33%
Formula
Percentage change = [(151 - 809) / 809] x 100
Subtract the new number by the original number
151 - 809 = -658
-658 ÷ 809 = -0.8133498145859085
-0.8133498145859085 x 100 = -81.33%