1127.78% is the change from 18 to 221
Calculation steps:
[( 221 - 18 ) ÷ 18] x 100 = 1127.78%
Formula
Percentage change = [(221 - 18) / 18] x 100
Subtract the new number by the original number
221 - 18 = 203
203 ÷ 18 = 11.277777777777779
11.277777777777779 x 100 = 1127.78%