-90.06% is the change from 684 to 68
Calculation steps:
[( 68 - 684 ) ÷ 684] x 100 = -90.06%
Formula
Percentage change = [(68 - 684) / 684] x 100
Subtract the new number by the original number
68 - 684 = -616
-616 ÷ 684 = -0.9005847953216374
-0.9005847953216374 x 100 = -90.06%