-97.65% is the change from 340 to 8
Calculation steps:
[( 8 - 340 ) ÷ 340] x 100 = -97.65%
Formula
Percentage change = [(8 - 340) / 340] x 100
Subtract the new number by the original number
8 - 340 = -332
-332 ÷ 340 = -0.9764705882352941
-0.9764705882352941 x 100 = -97.65%