-2.13% is the change from 939 to 919
Calculation steps:
[( 919 - 939 ) ÷ 939] x 100 = -2.13%
Formula
Percentage change = [(919 - 939) / 939] x 100
Subtract the new number by the original number
919 - 939 = -20
-20 ÷ 939 = -0.021299254526091587
-0.021299254526091587 x 100 = -2.13%