31.78% is the change from 343 to 452
Calculation steps:
[( 452 - 343 ) ÷ 343] x 100 = 31.78%
Formula
Percentage change = [(452 - 343) / 343] x 100
Subtract the new number by the original number
452 - 343 = 109
109 ÷ 343 = 0.3177842565597668
0.3177842565597668 x 100 = 31.78%