-96.89% is the change from 676 to 21
Calculation steps:
[( 21 - 676 ) ÷ 676] x 100 = -96.89%
Formula
Percentage change = [(21 - 676) / 676] x 100
Subtract the new number by the original number
21 - 676 = -655
-655 ÷ 676 = -0.9689349112426036
-0.9689349112426036 x 100 = -96.89%