-39.62% is the change from 838 to 506
Calculation steps:
[( 506 - 838 ) ÷ 838] x 100 = -39.62%
Formula
Percentage change = [(506 - 838) / 838] x 100
Subtract the new number by the original number
506 - 838 = -332
-332 ÷ 838 = -0.39618138424821003
-0.39618138424821003 x 100 = -39.62%