28.57% is the change from 266 to 342
Calculation steps:
[( 342 - 266 ) ÷ 266] x 100 = 28.57%
Formula
Percentage change = [(342 - 266) / 266] x 100
Subtract the new number by the original number
342 - 266 = 76
76 ÷ 266 = 0.2857142857142857
0.2857142857142857 x 100 = 28.57%