49.18% is the change from 305 to 455
Calculation steps:
[( 455 - 305 ) ÷ 305] x 100 = 49.18%
Formula
Percentage change = [(455 - 305) / 305] x 100
Subtract the new number by the original number
455 - 305 = 150
150 ÷ 305 = 0.4918032786885246
0.4918032786885246 x 100 = 49.18%