-91.54% is the change from 839 to 71
Calculation steps:
[( 71 - 839 ) ÷ 839] x 100 = -91.54%
Formula
Percentage change = [(71 - 839) / 839] x 100
Subtract the new number by the original number
71 - 839 = -768
-768 ÷ 839 = -0.9153754469606674
-0.9153754469606674 x 100 = -91.54%