-73.67% is the change from 638 to 168
Calculation steps:
[( 168 - 638 ) ÷ 638] x 100 = -73.67%
Formula
Percentage change = [(168 - 638) / 638] x 100
Subtract the new number by the original number
168 - 638 = -470
-470 ÷ 638 = -0.7366771159874608
-0.7366771159874608 x 100 = -73.67%