-81.6% is the change from 451 to 83
Calculation steps:
[( 83 - 451 ) ÷ 451] x 100 = -81.6%
Formula
Percentage change = [(83 - 451) / 451] x 100
Subtract the new number by the original number
83 - 451 = -368
-368 ÷ 451 = -0.8159645232815964
-0.8159645232815964 x 100 = -81.6%