-47.6% is the change from 939 to 492
Calculation steps:
[( 492 - 939 ) ÷ 939] x 100 = -47.6%
Formula
Percentage change = [(492 - 939) / 939] x 100
Subtract the new number by the original number
492 - 939 = -447
-447 ÷ 939 = -0.476038338658147
-0.476038338658147 x 100 = -47.6%