-70.32% is the change from 839 to 249
Calculation steps:
[( 249 - 839 ) ÷ 839] x 100 = -70.32%
Formula
Percentage change = [(249 - 839) / 839] x 100
Subtract the new number by the original number
249 - 839 = -590
-590 ÷ 839 = -0.7032181168057211
-0.7032181168057211 x 100 = -70.32%