49.27% is the change from 343 to 512
Calculation steps:
[( 512 - 343 ) ÷ 343] x 100 = 49.27%
Formula
Percentage change = [(512 - 343) / 343] x 100
Subtract the new number by the original number
512 - 343 = 169
169 ÷ 343 = 0.49271137026239065
0.49271137026239065 x 100 = 49.27%