-74.65% is the change from 639 to 162
Calculation steps:
[( 162 - 639 ) ÷ 639] x 100 = -74.65%
Formula
Percentage change = [(162 - 639) / 639] x 100
Subtract the new number by the original number
162 - 639 = -477
-477 ÷ 639 = -0.7464788732394366
-0.7464788732394366 x 100 = -74.65%