214.14% is the change from 99 to 311
Calculation steps:
[( 311 - 99 ) ÷ 99] x 100 = 214.14%
Formula
Percentage change = [(311 - 99) / 99] x 100
Subtract the new number by the original number
311 - 99 = 212
212 ÷ 99 = 2.1414141414141414
2.1414141414141414 x 100 = 214.14%