-0.21% is the change from 938 to 936
Calculation steps:
[( 936 - 938 ) ÷ 938] x 100 = -0.21%
Formula
Percentage change = [(936 - 938) / 938] x 100
Subtract the new number by the original number
936 - 938 = -2
-2 ÷ 938 = -0.0021321961620469083
-0.0021321961620469083 x 100 = -0.21%