-32.7% is the change from 477 to 321
Calculation steps:
[( 321 - 477 ) ÷ 477] x 100 = -32.7%
Formula
Percentage change = [(321 - 477) / 477] x 100
Subtract the new number by the original number
321 - 477 = -156
-156 ÷ 477 = -0.3270440251572327
-0.3270440251572327 x 100 = -32.7%