30.42% is the change from 263 to 343
Calculation steps:
[( 343 - 263 ) ÷ 263] x 100 = 30.42%
Formula
Percentage change = [(343 - 263) / 263] x 100
Subtract the new number by the original number
343 - 263 = 80
80 ÷ 263 = 0.3041825095057034
0.3041825095057034 x 100 = 30.42%