62.39% is the change from 343 to 557
Calculation steps:
[( 557 - 343 ) ÷ 343] x 100 = 62.39%
Formula
Percentage change = [(557 - 343) / 343] x 100
Subtract the new number by the original number
557 - 343 = 214
214 ÷ 343 = 0.6239067055393586
0.6239067055393586 x 100 = 62.39%