-87.91% is the change from 827 to 100
Calculation steps:
[( 100 - 827 ) ÷ 827] x 100 = -87.91%
Formula
Percentage change = [(100 - 827) / 827] x 100
Subtract the new number by the original number
100 - 827 = -727
-727 ÷ 827 = -0.879081015719468
-0.879081015719468 x 100 = -87.91%