-89.13% is the change from 828 to 90
Calculation steps:
[( 90 - 828 ) ÷ 828] x 100 = -89.13%
Formula
Percentage change = [(90 - 828) / 828] x 100
Subtract the new number by the original number
90 - 828 = -738
-738 ÷ 828 = -0.8913043478260869
-0.8913043478260869 x 100 = -89.13%