57.43% is the change from 343 to 540
Calculation steps:
[( 540 - 343 ) ÷ 343] x 100 = 57.43%
Formula
Percentage change = [(540 - 343) / 343] x 100
Subtract the new number by the original number
540 - 343 = 197
197 ÷ 343 = 0.5743440233236151
0.5743440233236151 x 100 = 57.43%