269.7% is the change from 99 to 366
Calculation steps:
[( 366 - 99 ) ÷ 99] x 100 = 269.7%
Formula
Percentage change = [(366 - 99) / 99] x 100
Subtract the new number by the original number
366 - 99 = 267
267 ÷ 99 = 2.696969696969697
2.696969696969697 x 100 = 269.7%