240% is the change from 30 to 102
Calculation steps:
[( 102 - 30 ) ÷ 30] x 100 = 240%
Formula
Percentage change = [(102 - 30) / 30] x 100
Subtract the new number by the original number
102 - 30 = 72
72 ÷ 30 = 2.4
2.4 x 100 = 240%
Example