242.42% is the change from 99 to 339
Calculation steps:
[( 339 - 99 ) ÷ 99] x 100 = 242.42%
Formula
Percentage change = [(339 - 99) / 99] x 100
Subtract the new number by the original number
339 - 99 = 240
240 ÷ 99 = 2.4242424242424243
2.4242424242424243 x 100 = 242.42%