-91.19% is the change from 454 to 40
Calculation steps:
[( 40 - 454 ) ÷ 454] x 100 = -91.19%
Formula
Percentage change = [(40 - 454) / 454] x 100
Subtract the new number by the original number
40 - 454 = -414
-414 ÷ 454 = -0.9118942731277533
-0.9118942731277533 x 100 = -91.19%