-18.66% is the change from 477 to 388
Calculation steps:
[( 388 - 477 ) ÷ 477] x 100 = -18.66%
Formula
Percentage change = [(388 - 477) / 477] x 100
Subtract the new number by the original number
388 - 477 = -89
-89 ÷ 477 = -0.18658280922431866
-0.18658280922431866 x 100 = -18.66%