-58.47% is the change from 939 to 390
Calculation steps:
[( 390 - 939 ) ÷ 939] x 100 = -58.47%
Formula
Percentage change = [(390 - 939) / 939] x 100
Subtract the new number by the original number
390 - 939 = -549
-549 ÷ 939 = -0.5846645367412141
-0.5846645367412141 x 100 = -58.47%