438.89% is the change from 18 to 97
Calculation steps:
[( 97 - 18 ) ÷ 18] x 100 = 438.89%
Formula
Percentage change = [(97 - 18) / 18] x 100
Subtract the new number by the original number
97 - 18 = 79
79 ÷ 18 = 4.388888888888889
4.388888888888889 x 100 = 438.89%