-51.49% is the change from 839 to 407
Calculation steps:
[( 407 - 839 ) ÷ 839] x 100 = -51.49%
Formula
Percentage change = [(407 - 839) / 839] x 100
Subtract the new number by the original number
407 - 839 = -432
-432 ÷ 839 = -0.5148986889153755
-0.5148986889153755 x 100 = -51.49%