-45.47% is the change from 939 to 512
Calculation steps:
[( 512 - 939 ) ÷ 939] x 100 = -45.47%
Formula
Percentage change = [(512 - 939) / 939] x 100
Subtract the new number by the original number
512 - 939 = -427
-427 ÷ 939 = -0.4547390841320554
-0.4547390841320554 x 100 = -45.47%