42.63% is the change from 319 to 455
Calculation steps:
[( 455 - 319 ) ÷ 319] x 100 = 42.63%
Formula
Percentage change = [(455 - 319) / 319] x 100
Subtract the new number by the original number
455 - 319 = 136
136 ÷ 319 = 0.4263322884012539
0.4263322884012539 x 100 = 42.63%