21.2% is the change from 250 to 303
Calculation steps:
[( 303 - 250 ) ÷ 250] x 100 = 21.2%
Formula
Percentage change = [(303 - 250) / 250] x 100
Subtract the new number by the original number
303 - 250 = 53
53 ÷ 250 = 0.212
0.212 x 100 = 21.2%
Example