28.95% is the change from 266 to 343
Calculation steps:
[( 343 - 266 ) ÷ 266] x 100 = 28.95%
Formula
Percentage change = [(343 - 266) / 266] x 100
Subtract the new number by the original number
343 - 266 = 77
77 ÷ 266 = 0.2894736842105263
0.2894736842105263 x 100 = 28.95%