490% is the change from 30 to 177
Calculation steps:
[( 177 - 30 ) ÷ 30] x 100 = 490%
Formula
Percentage change = [(177 - 30) / 30] x 100
Subtract the new number by the original number
177 - 30 = 147
147 ÷ 30 = 4.9
4.9 x 100 = 490%
Example