-89.6% is the change from 644 to 67
Calculation steps:
[( 67 - 644 ) ÷ 644] x 100 = -89.6%
Formula
Percentage change = [(67 - 644) / 644] x 100
Subtract the new number by the original number
67 - 644 = -577
-577 ÷ 644 = -0.8959627329192547
-0.8959627329192547 x 100 = -89.6%