-98.82% is the change from 340 to 4
Calculation steps:
[( 4 - 340 ) ÷ 340] x 100 = -98.82%
Formula
Percentage change = [(4 - 340) / 340] x 100
Subtract the new number by the original number
4 - 340 = -336
-336 ÷ 340 = -0.9882352941176471
-0.9882352941176471 x 100 = -98.82%