-98.69% is the change from 306 to 4
Calculation steps:
[( 4 - 306 ) ÷ 306] x 100 = -98.69%
Formula
Percentage change = [(4 - 306) / 306] x 100
Subtract the new number by the original number
4 - 306 = -302
-302 ÷ 306 = -0.9869281045751634
-0.9869281045751634 x 100 = -98.69%