394.44% is the change from 18 to 89
Calculation steps:
[( 89 - 18 ) ÷ 18] x 100 = 394.44%
Formula
Percentage change = [(89 - 18) / 18] x 100
Subtract the new number by the original number
89 - 18 = 71
71 ÷ 18 = 3.9444444444444446
3.9444444444444446 x 100 = 394.44%