-71.39% is the change from 839 to 240
Calculation steps:
[( 240 - 839 ) ÷ 839] x 100 = -71.39%
Formula
Percentage change = [(240 - 839) / 839] x 100
Subtract the new number by the original number
240 - 839 = -599
-599 ÷ 839 = -0.7139451728247914
-0.7139451728247914 x 100 = -71.39%