-52.09% is the change from 839 to 402
Calculation steps:
[( 402 - 839 ) ÷ 839] x 100 = -52.09%
Formula
Percentage change = [(402 - 839) / 839] x 100
Subtract the new number by the original number
402 - 839 = -437
-437 ÷ 839 = -0.5208581644815257
-0.5208581644815257 x 100 = -52.09%