-82.36% is the change from 839 to 148
Calculation steps:
[( 148 - 839 ) ÷ 839] x 100 = -82.36%
Formula
Percentage change = [(148 - 839) / 839] x 100
Subtract the new number by the original number
148 - 839 = -691
-691 ÷ 839 = -0.8235995232419547
-0.8235995232419547 x 100 = -82.36%