83.33% is the change from 18 to 33
Calculation steps:
[( 33 - 18 ) ÷ 18] x 100 = 83.33%
Formula
Percentage change = [(33 - 18) / 18] x 100
Subtract the new number by the original number
33 - 18 = 15
15 ÷ 18 = 0.8333333333333334
0.8333333333333334 x 100 = 83.33%