153.54% is the change from 99 to 251
Calculation steps:
[( 251 - 99 ) ÷ 99] x 100 = 153.54%
Formula
Percentage change = [(251 - 99) / 99] x 100
Subtract the new number by the original number
251 - 99 = 152
152 ÷ 99 = 1.5353535353535352
1.5353535353535352 x 100 = 153.54%