-89.98% is the change from 808 to 81
Calculation steps:
[( 81 - 808 ) ÷ 808] x 100 = -89.98%
Formula
Percentage change = [(81 - 808) / 808] x 100
Subtract the new number by the original number
81 - 808 = -727
-727 ÷ 808 = -0.8997524752475248
-0.8997524752475248 x 100 = -89.98%