180% is the change from 30 to 84
Calculation steps:
[( 84 - 30 ) ÷ 30] x 100 = 180%
Formula
Percentage change = [(84 - 30) / 30] x 100
Subtract the new number by the original number
84 - 30 = 54
54 ÷ 30 = 1.8
1.8 x 100 = 180%
Example