286.4% is the change from 250 to 966
Calculation steps:
[( 966 - 250 ) ÷ 250] x 100 = 286.4%
Formula
Percentage change = [(966 - 250) / 250] x 100
Subtract the new number by the original number
966 - 250 = 716
716 ÷ 250 = 2.864
2.864 x 100 = 286.4%
Example