-73.91% is the change from 644 to 168
Calculation steps:
[( 168 - 644 ) ÷ 644] x 100 = -73.91%
Formula
Percentage change = [(168 - 644) / 644] x 100
Subtract the new number by the original number
168 - 644 = -476
-476 ÷ 644 = -0.7391304347826086
-0.7391304347826086 x 100 = -73.91%