31.18% is the change from 263 to 345
Calculation steps:
[( 345 - 263 ) ÷ 263] x 100 = 31.18%
Formula
Percentage change = [(345 - 263) / 263] x 100
Subtract the new number by the original number
345 - 263 = 82
82 ÷ 263 = 0.311787072243346
0.311787072243346 x 100 = 31.18%