-40.64% is the change from 839 to 498
Calculation steps:
[( 498 - 839 ) ÷ 839] x 100 = -40.64%
Formula
Percentage change = [(498 - 839) / 839] x 100
Subtract the new number by the original number
498 - 839 = -341
-341 ÷ 839 = -0.4064362336114422
-0.4064362336114422 x 100 = -40.64%