49.84% is the change from 305 to 457
Calculation steps:
[( 457 - 305 ) ÷ 305] x 100 = 49.84%
Formula
Percentage change = [(457 - 305) / 305] x 100
Subtract the new number by the original number
457 - 305 = 152
152 ÷ 305 = 0.49836065573770494
0.49836065573770494 x 100 = 49.84%