-91.25% is the change from 457 to 40
Calculation steps:
[( 40 - 457 ) ÷ 457] x 100 = -91.25%
Formula
Percentage change = [(40 - 457) / 457] x 100
Subtract the new number by the original number
40 - 457 = -417
-417 ÷ 457 = -0.912472647702407
-0.912472647702407 x 100 = -91.25%