-81.46% is the change from 809 to 150
Calculation steps:
[( 150 - 809 ) ÷ 809] x 100 = -81.46%
Formula
Percentage change = [(150 - 809) / 809] x 100
Subtract the new number by the original number
150 - 809 = -659
-659 ÷ 809 = -0.8145859085290482
-0.8145859085290482 x 100 = -81.46%