-98.55% is the change from 827 to 12
Calculation steps:
[( 12 - 827 ) ÷ 827] x 100 = -98.55%
Formula
Percentage change = [(12 - 827) / 827] x 100
Subtract the new number by the original number
12 - 827 = -815
-815 ÷ 827 = -0.9854897218863361
-0.9854897218863361 x 100 = -98.55%