-45.69% is the change from 939 to 510
Calculation steps:
[( 510 - 939 ) ÷ 939] x 100 = -45.69%
Formula
Percentage change = [(510 - 939) / 939] x 100
Subtract the new number by the original number
510 - 939 = -429
-429 ÷ 939 = -0.45686900958466453
-0.45686900958466453 x 100 = -45.69%