-98.7% is the change from 307 to 4
Calculation steps:
[( 4 - 307 ) ÷ 307] x 100 = -98.7%
Formula
Percentage change = [(4 - 307) / 307] x 100
Subtract the new number by the original number
4 - 307 = -303
-303 ÷ 307 = -0.9869706840390879
-0.9869706840390879 x 100 = -98.7%