77.17% is the change from 254 to 450
Calculation steps:
[( 450 - 254 ) ÷ 254] x 100 = 77.17%
Formula
Percentage change = [(450 - 254) / 254] x 100
Subtract the new number by the original number
450 - 254 = 196
196 ÷ 254 = 0.7716535433070866
0.7716535433070866 x 100 = 77.17%