96.4% is the change from 250 to 491
Calculation steps:
[( 491 - 250 ) ÷ 250] x 100 = 96.4%
Formula
Percentage change = [(491 - 250) / 250] x 100
Subtract the new number by the original number
491 - 250 = 241
241 ÷ 250 = 0.964
0.964 x 100 = 96.4%
Example