253.54% is the change from 99 to 350
Calculation steps:
[( 350 - 99 ) ÷ 99] x 100 = 253.54%
Formula
Percentage change = [(350 - 99) / 99] x 100
Subtract the new number by the original number
350 - 99 = 251
251 ÷ 99 = 2.5353535353535355
2.5353535353535355 x 100 = 253.54%