-41.47% is the change from 815 to 477
Calculation steps:
[( 477 - 815 ) ÷ 815] x 100 = -41.47%
Formula
Percentage change = [(477 - 815) / 815] x 100
Subtract the new number by the original number
477 - 815 = -338
-338 ÷ 815 = -0.4147239263803681
-0.4147239263803681 x 100 = -41.47%