288.89% is the change from 18 to 70
Calculation steps:
[( 70 - 18 ) ÷ 18] x 100 = 288.89%
Formula
Percentage change = [(70 - 18) / 18] x 100
Subtract the new number by the original number
70 - 18 = 52
52 ÷ 18 = 2.888888888888889
2.888888888888889 x 100 = 288.89%