2470% is the change from 30 to 771
Calculation steps:
[( 771 - 30 ) ÷ 30] x 100 = 2470%
Formula
Percentage change = [(771 - 30) / 30] x 100
Subtract the new number by the original number
771 - 30 = 741
741 ÷ 30 = 24.7
24.7 x 100 = 2470%
Example