-91.13% is the change from 451 to 40
Calculation steps:
[( 40 - 451 ) ÷ 451] x 100 = -91.13%
Formula
Percentage change = [(40 - 451) / 451] x 100
Subtract the new number by the original number
40 - 451 = -411
-411 ÷ 451 = -0.9113082039911308
-0.9113082039911308 x 100 = -91.13%