30% is the change from 100 to 130
Calculation steps:
[( 130 - 100 ) ÷ 100] x 100 = 30%
Formula
Percentage change = [(130 - 100) / 100] x 100
Subtract the new number by the original number
130 - 100 = 30
30 ÷ 100 = 0.3
0.3 x 100 = 30%
Example