2580% is the change from 30 to 804
Calculation steps:
[( 804 - 30 ) ÷ 30] x 100 = 2580%
Formula
Percentage change = [(804 - 30) / 30] x 100
Subtract the new number by the original number
804 - 30 = 774
774 ÷ 30 = 25.8
25.8 x 100 = 2580%
Example