7550% is the change from 4 to 306
Calculation steps:
[( 306 - 4 ) ÷ 4] x 100 = 7550%
Formula
Percentage change = [(306 - 4) / 4] x 100
Subtract the new number by the original number
306 - 4 = 302
302 ÷ 4 = 75.5
75.5 x 100 = 7550%
Example