-91.49% is the change from 470 to 40
Calculation steps:
[( 40 - 470 ) ÷ 470] x 100 = -91.49%
Formula
Percentage change = [(40 - 470) / 470] x 100
Subtract the new number by the original number
40 - 470 = -430
-430 ÷ 470 = -0.9148936170212766
-0.9148936170212766 x 100 = -91.49%