-90.36% is the change from 809 to 78
Calculation steps:
[( 78 - 809 ) ÷ 809] x 100 = -90.36%
Formula
Percentage change = [(78 - 809) / 809] x 100
Subtract the new number by the original number
78 - 809 = -731
-731 ÷ 809 = -0.9035846724351051
-0.9035846724351051 x 100 = -90.36%