320% is the change from 30 to 126
Calculation steps:
[( 126 - 30 ) ÷ 30] x 100 = 320%
Formula
Percentage change = [(126 - 30) / 30] x 100
Subtract the new number by the original number
126 - 30 = 96
96 ÷ 30 = 3.2
3.2 x 100 = 320%
Example