78.4% is the change from 250 to 446
Calculation steps:
[( 446 - 250 ) ÷ 250] x 100 = 78.4%
Formula
Percentage change = [(446 - 250) / 250] x 100
Subtract the new number by the original number
446 - 250 = 196
196 ÷ 250 = 0.784
0.784 x 100 = 78.4%
Example