233.33% is the change from 30 to 100
Calculation steps:
[( 100 - 30 ) ÷ 30] x 100 = 233.33%
Formula
Percentage change = [(100 - 30) / 30] x 100
Subtract the new number by the original number
100 - 30 = 70
70 ÷ 30 = 2.3333333333333335
2.3333333333333335 x 100 = 233.33%