-80.85% is the change from 470 to 90
Calculation steps:
[( 90 - 470 ) ÷ 470] x 100 = -80.85%
Formula
Percentage change = [(90 - 470) / 470] x 100
Subtract the new number by the original number
90 - 470 = -380
-380 ÷ 470 = -0.8085106382978723
-0.8085106382978723 x 100 = -80.85%