-65.98% is the change from 823 to 280
Calculation steps:
[( 280 - 823 ) ÷ 823] x 100 = -65.98%
Formula
Percentage change = [(280 - 823) / 823] x 100
Subtract the new number by the original number
280 - 823 = -543
-543 ÷ 823 = -0.6597812879708383
-0.6597812879708383 x 100 = -65.98%