-47.79% is the change from 839 to 438
Calculation steps:
[( 438 - 839 ) ÷ 839] x 100 = -47.79%
Formula
Percentage change = [(438 - 839) / 839] x 100
Subtract the new number by the original number
438 - 839 = -401
-401 ÷ 839 = -0.47794994040524436
-0.47794994040524436 x 100 = -47.79%