221.21% is the change from 99 to 318
Calculation steps:
[( 318 - 99 ) ÷ 99] x 100 = 221.21%
Formula
Percentage change = [(318 - 99) / 99] x 100
Subtract the new number by the original number
318 - 99 = 219
219 ÷ 99 = 2.212121212121212
2.212121212121212 x 100 = 221.21%