1622.22% is the change from 18 to 310
Calculation steps:
[( 310 - 18 ) ÷ 18] x 100 = 1622.22%
Formula
Percentage change = [(310 - 18) / 18] x 100
Subtract the new number by the original number
310 - 18 = 292
292 ÷ 18 = 16.22222222222222
16.22222222222222 x 100 = 1622.22%