-0.25% is the change from 790 to 788
Calculation steps:
[( 788 - 790 ) ÷ 790] x 100 = -0.25%
Formula
Percentage change = [(788 - 790) / 790] x 100
Subtract the new number by the original number
788 - 790 = -2
-2 ÷ 790 = -0.002531645569620253
-0.002531645569620253 x 100 = -0.25%