-71.63% is the change from 638 to 181
Calculation steps:
[( 181 - 638 ) ÷ 638] x 100 = -71.63%
Formula
Percentage change = [(181 - 638) / 638] x 100
Subtract the new number by the original number
181 - 638 = -457
-457 ÷ 638 = -0.7163009404388715
-0.7163009404388715 x 100 = -71.63%