81.92% is the change from 343 to 624
Calculation steps:
[( 624 - 343 ) ÷ 343] x 100 = 81.92%
Formula
Percentage change = [(624 - 343) / 343] x 100
Subtract the new number by the original number
624 - 343 = 281
281 ÷ 343 = 0.8192419825072886
0.8192419825072886 x 100 = 81.92%