9.4% is the change from 266 to 291
Calculation steps:
[( 291 - 266 ) ÷ 266] x 100 = 9.4%
Formula
Percentage change = [(291 - 266) / 266] x 100
Subtract the new number by the original number
291 - 266 = 25
25 ÷ 266 = 0.09398496240601503
0.09398496240601503 x 100 = 9.4%