-41.23% is the change from 815 to 479
Calculation steps:
[( 479 - 815 ) ÷ 815] x 100 = -41.23%
Formula
Percentage change = [(479 - 815) / 815] x 100
Subtract the new number by the original number
479 - 815 = -336
-336 ÷ 815 = -0.41226993865030676
-0.41226993865030676 x 100 = -41.23%