-0.21% is the change from 939 to 937
Calculation steps:
[( 937 - 939 ) ÷ 939] x 100 = -0.21%
Formula
Percentage change = [(937 - 939) / 939] x 100
Subtract the new number by the original number
937 - 939 = -2
-2 ÷ 939 = -0.002129925452609159
-0.002129925452609159 x 100 = -0.21%