-30.61% is the change from 477 to 331
Calculation steps:
[( 331 - 477 ) ÷ 477] x 100 = -30.61%
Formula
Percentage change = [(331 - 477) / 477] x 100
Subtract the new number by the original number
331 - 477 = -146
-146 ÷ 477 = -0.3060796645702306
-0.3060796645702306 x 100 = -30.61%