-74.14% is the change from 638 to 165
Calculation steps:
[( 165 - 638 ) ÷ 638] x 100 = -74.14%
Formula
Percentage change = [(165 - 638) / 638] x 100
Subtract the new number by the original number
165 - 638 = -473
-473 ÷ 638 = -0.7413793103448276
-0.7413793103448276 x 100 = -74.14%