-89.51% is the change from 839 to 88
Calculation steps:
[( 88 - 839 ) ÷ 839] x 100 = -89.51%
Formula
Percentage change = [(88 - 839) / 839] x 100
Subtract the new number by the original number
88 - 839 = -751
-751 ÷ 839 = -0.8951132300357568
-0.8951132300357568 x 100 = -89.51%