-26.58% is the change from 647 to 475
Calculation steps:
[( 475 - 647 ) ÷ 647] x 100 = -26.58%
Formula
Percentage change = [(475 - 647) / 647] x 100
Subtract the new number by the original number
475 - 647 = -172
-172 ÷ 647 = -0.26584234930448225
-0.26584234930448225 x 100 = -26.58%