-82.04% is the change from 451 to 81
Calculation steps:
[( 81 - 451 ) ÷ 451] x 100 = -82.04%
Formula
Percentage change = [(81 - 451) / 451] x 100
Subtract the new number by the original number
81 - 451 = -370
-370 ÷ 451 = -0.8203991130820399
-0.8203991130820399 x 100 = -82.04%