-40.88% is the change from 839 to 496
Calculation steps:
[( 496 - 839 ) ÷ 839] x 100 = -40.88%
Formula
Percentage change = [(496 - 839) / 839] x 100
Subtract the new number by the original number
496 - 839 = -343
-343 ÷ 839 = -0.4088200238379023
-0.4088200238379023 x 100 = -40.88%