-69.25% is the change from 839 to 258
Calculation steps:
[( 258 - 839 ) ÷ 839] x 100 = -69.25%
Formula
Percentage change = [(258 - 839) / 839] x 100
Subtract the new number by the original number
258 - 839 = -581
-581 ÷ 839 = -0.6924910607866508
-0.6924910607866508 x 100 = -69.25%