-27.24% is the change from 646 to 470
Calculation steps:
[( 470 - 646 ) ÷ 646] x 100 = -27.24%
Formula
Percentage change = [(470 - 646) / 646] x 100
Subtract the new number by the original number
470 - 646 = -176
-176 ÷ 646 = -0.2724458204334365
-0.2724458204334365 x 100 = -27.24%