278.4% is the change from 250 to 946
Calculation steps:
[( 946 - 250 ) ÷ 250] x 100 = 278.4%
Formula
Percentage change = [(946 - 250) / 250] x 100
Subtract the new number by the original number
946 - 250 = 696
696 ÷ 250 = 2.784
2.784 x 100 = 278.4%
Example