21.6% is the change from 250 to 304
Calculation steps:
[( 304 - 250 ) ÷ 250] x 100 = 21.6%
Formula
Percentage change = [(304 - 250) / 250] x 100
Subtract the new number by the original number
304 - 250 = 54
54 ÷ 250 = 0.216
0.216 x 100 = 21.6%
Example