-81.8% is the change from 456 to 83
Calculation steps:
[( 83 - 456 ) ÷ 456] x 100 = -81.8%
Formula
Percentage change = [(83 - 456) / 456] x 100
Subtract the new number by the original number
83 - 456 = -373
-373 ÷ 456 = -0.8179824561403509
-0.8179824561403509 x 100 = -81.8%