45.83% is the change from 312 to 455
Calculation steps:
[( 455 - 312 ) ÷ 312] x 100 = 45.83%
Formula
Percentage change = [(455 - 312) / 312] x 100
Subtract the new number by the original number
455 - 312 = 143
143 ÷ 312 = 0.4583333333333333
0.4583333333333333 x 100 = 45.83%