-84.73% is the change from 668 to 102
Calculation steps:
[( 102 - 668 ) ÷ 668] x 100 = -84.73%
Formula
Percentage change = [(102 - 668) / 668] x 100
Subtract the new number by the original number
102 - 668 = -566
-566 ÷ 668 = -0.8473053892215568
-0.8473053892215568 x 100 = -84.73%