4271.43% is the change from 7 to 306
Calculation steps:
[( 306 - 7 ) ÷ 7] x 100 = 4271.43%
Formula
Percentage change = [(306 - 7) / 7] x 100
Subtract the new number by the original number
306 - 7 = 299
299 ÷ 7 = 42.714285714285715
42.714285714285715 x 100 = 4271.43%