-89.23% is the change from 678 to 73
Calculation steps:
[( 73 - 678 ) ÷ 678] x 100 = -89.23%
Formula
Percentage change = [(73 - 678) / 678] x 100
Subtract the new number by the original number
73 - 678 = -605
-605 ÷ 678 = -0.8923303834808259
-0.8923303834808259 x 100 = -89.23%