-52.27% is the change from 815 to 389
Calculation steps:
[( 389 - 815 ) ÷ 815] x 100 = -52.27%
Formula
Percentage change = [(389 - 815) / 815] x 100
Subtract the new number by the original number
389 - 815 = -426
-426 ÷ 815 = -0.5226993865030675
-0.5226993865030675 x 100 = -52.27%