29.7% is the change from 266 to 345
Calculation steps:
[( 345 - 266 ) ÷ 266] x 100 = 29.7%
Formula
Percentage change = [(345 - 266) / 266] x 100
Subtract the new number by the original number
345 - 266 = 79
79 ÷ 266 = 0.29699248120300753
0.29699248120300753 x 100 = 29.7%