23.57% is the change from 280 to 346
Calculation steps:
[( 346 - 280 ) ÷ 280] x 100 = 23.57%
Formula
Percentage change = [(346 - 280) / 280] x 100
Subtract the new number by the original number
346 - 280 = 66
66 ÷ 280 = 0.2357142857142857
0.2357142857142857 x 100 = 23.57%