30.08% is the change from 266 to 346
Calculation steps:
[( 346 - 266 ) ÷ 266] x 100 = 30.08%
Formula
Percentage change = [(346 - 266) / 266] x 100
Subtract the new number by the original number
346 - 266 = 80
80 ÷ 266 = 0.3007518796992481
0.3007518796992481 x 100 = 30.08%