-17.78% is the change from 827 to 680
Calculation steps:
[( 680 - 827 ) ÷ 827] x 100 = -17.78%
Formula
Percentage change = [(680 - 827) / 827] x 100
Subtract the new number by the original number
680 - 827 = -147
-147 ÷ 827 = -0.1777509068923821
-0.1777509068923821 x 100 = -17.78%