-40.57% is the change from 838 to 498
Calculation steps:
[( 498 - 838 ) ÷ 838] x 100 = -40.57%
Formula
Percentage change = [(498 - 838) / 838] x 100
Subtract the new number by the original number
498 - 838 = -340
-340 ÷ 838 = -0.40572792362768495
-0.40572792362768495 x 100 = -40.57%