287.88% is the change from 99 to 384
Calculation steps:
[( 384 - 99 ) ÷ 99] x 100 = 287.88%
Formula
Percentage change = [(384 - 99) / 99] x 100
Subtract the new number by the original number
384 - 99 = 285
285 ÷ 99 = 2.878787878787879
2.878787878787879 x 100 = 287.88%