27.04% is the change from 270 to 343
Calculation steps:
[( 343 - 270 ) ÷ 270] x 100 = 27.04%
Formula
Percentage change = [(343 - 270) / 270] x 100
Subtract the new number by the original number
343 - 270 = 73
73 ÷ 270 = 0.27037037037037037
0.27037037037037037 x 100 = 27.04%