-89.51% is the change from 648 to 68
Calculation steps:
[( 68 - 648 ) ÷ 648] x 100 = -89.51%
Formula
Percentage change = [(68 - 648) / 648] x 100
Subtract the new number by the original number
68 - 648 = -580
-580 ÷ 648 = -0.8950617283950617
-0.8950617283950617 x 100 = -89.51%