120.4% is the change from 250 to 551
Calculation steps:
[( 551 - 250 ) ÷ 250] x 100 = 120.4%
Formula
Percentage change = [(551 - 250) / 250] x 100
Subtract the new number by the original number
551 - 250 = 301
301 ÷ 250 = 1.204
1.204 x 100 = 120.4%
Example