2400% is the change from 3 to 75
Calculation steps:
[( 75 - 3 ) ÷ 3] x 100 = 2400%
Formula
Percentage change = [(75 - 3) / 3] x 100
Subtract the new number by the original number
75 - 3 = 72
72 ÷ 3 = 24
24 x 100 = 2400%
Example