-45.15% is the change from 939 to 515
Calculation steps:
[( 515 - 939 ) ÷ 939] x 100 = -45.15%
Formula
Percentage change = [(515 - 939) / 939] x 100
Subtract the new number by the original number
515 - 939 = -424
-424 ÷ 939 = -0.45154419595314166
-0.45154419595314166 x 100 = -45.15%