-68.51% is the change from 686 to 216
Calculation steps:
[( 216 - 686 ) ÷ 686] x 100 = -68.51%
Formula
Percentage change = [(216 - 686) / 686] x 100
Subtract the new number by the original number
216 - 686 = -470
-470 ÷ 686 = -0.685131195335277
-0.685131195335277 x 100 = -68.51%