-83.92% is the change from 423 to 68
Calculation steps:
[( 68 - 423 ) ÷ 423] x 100 = -83.92%
Formula
Percentage change = [(68 - 423) / 423] x 100
Subtract the new number by the original number
68 - 423 = -355
-355 ÷ 423 = -0.8392434988179669
-0.8392434988179669 x 100 = -83.92%