109.4% is the change from 266 to 557
Calculation steps:
[( 557 - 266 ) ÷ 266] x 100 = 109.4%
Formula
Percentage change = [(557 - 266) / 266] x 100
Subtract the new number by the original number
557 - 266 = 291
291 ÷ 266 = 1.093984962406015
1.093984962406015 x 100 = 109.4%