-43.93% is the change from 815 to 457
Calculation steps:
[( 457 - 815 ) ÷ 815] x 100 = -43.93%
Formula
Percentage change = [(457 - 815) / 815] x 100
Subtract the new number by the original number
457 - 815 = -358
-358 ÷ 815 = -0.4392638036809816
-0.4392638036809816 x 100 = -43.93%