-40.76% is the change from 839 to 497
Calculation steps:
[( 497 - 839 ) ÷ 839] x 100 = -40.76%
Formula
Percentage change = [(497 - 839) / 839] x 100
Subtract the new number by the original number
497 - 839 = -342
-342 ÷ 839 = -0.40762812872467225
-0.40762812872467225 x 100 = -40.76%