-67.78% is the change from 686 to 221
Calculation steps:
[( 221 - 686 ) ÷ 686] x 100 = -67.78%
Formula
Percentage change = [(221 - 686) / 686] x 100
Subtract the new number by the original number
221 - 686 = -465
-465 ÷ 686 = -0.6778425655976676
-0.6778425655976676 x 100 = -67.78%