-98.4% is the change from 250 to 4
Calculation steps:
[( 4 - 250 ) ÷ 250] x 100 = -98.4%
Formula
Percentage change = [(4 - 250) / 250] x 100
Subtract the new number by the original number
4 - 250 = -246
-246 ÷ 250 = -0.984
-0.984 x 100 = -98.4%
Example