-91.23% is the change from 456 to 40
Calculation steps:
[( 40 - 456 ) ÷ 456] x 100 = -91.23%
Formula
Percentage change = [(40 - 456) / 456] x 100
Subtract the new number by the original number
40 - 456 = -416
-416 ÷ 456 = -0.9122807017543859
-0.9122807017543859 x 100 = -91.23%