-0.25% is the change from 403 to 402
Calculation steps:
[( 402 - 403 ) ÷ 403] x 100 = -0.25%
Formula
Percentage change = [(402 - 403) / 403] x 100
Subtract the new number by the original number
402 - 403 = -1
-1 ÷ 403 = -0.0024813895781637717
-0.0024813895781637717 x 100 = -0.25%