31.59% is the change from 345 to 454
Calculation steps:
[( 454 - 345 ) ÷ 345] x 100 = 31.59%
Formula
Percentage change = [(454 - 345) / 345] x 100
Subtract the new number by the original number
454 - 345 = 109
109 ÷ 345 = 0.3159420289855073
0.3159420289855073 x 100 = 31.59%