-66.27% is the change from 839 to 283
Calculation steps:
[( 283 - 839 ) ÷ 839] x 100 = -66.27%
Formula
Percentage change = [(283 - 839) / 839] x 100
Subtract the new number by the original number
283 - 839 = -556
-556 ÷ 839 = -0.6626936829558999
-0.6626936829558999 x 100 = -66.27%