-49.34% is the change from 839 to 425
Calculation steps:
[( 425 - 839 ) ÷ 839] x 100 = -49.34%
Formula
Percentage change = [(425 - 839) / 839] x 100
Subtract the new number by the original number
425 - 839 = -414
-414 ÷ 839 = -0.4934445768772348
-0.4934445768772348 x 100 = -49.34%