-26.47% is the change from 646 to 475
Calculation steps:
[( 475 - 646 ) ÷ 646] x 100 = -26.47%
Formula
Percentage change = [(475 - 646) / 646] x 100
Subtract the new number by the original number
475 - 646 = -171
-171 ÷ 646 = -0.2647058823529412
-0.2647058823529412 x 100 = -26.47%