30.04% is the change from 273 to 355
Calculation steps:
[( 355 - 273 ) ÷ 273] x 100 = 30.04%
Formula
Percentage change = [(355 - 273) / 273] x 100
Subtract the new number by the original number
355 - 273 = 82
82 ÷ 273 = 0.30036630036630035
0.30036630036630035 x 100 = 30.04%