-82.86% is the change from 490 to 84
Calculation steps:
[( 84 - 490 ) ÷ 490] x 100 = -82.86%
Formula
Percentage change = [(84 - 490) / 490] x 100
Subtract the new number by the original number
84 - 490 = -406
-406 ÷ 490 = -0.8285714285714286
-0.8285714285714286 x 100 = -82.86%