-21.3% is the change from 864 to 680
Calculation steps:
[( 680 - 864 ) ÷ 864] x 100 = -21.3%
Formula
Percentage change = [(680 - 864) / 864] x 100
Subtract the new number by the original number
680 - 864 = -184
-184 ÷ 864 = -0.21296296296296297
-0.21296296296296297 x 100 = -21.3%