2400% is the change from 30 to 750
Calculation steps:
[( 750 - 30 ) ÷ 30] x 100 = 2400%
Formula
Percentage change = [(750 - 30) / 30] x 100
Subtract the new number by the original number
750 - 30 = 720
720 ÷ 30 = 24
24 x 100 = 2400%
Example