-97.39% is the change from 345 to 9
Calculation steps:
[( 9 - 345 ) ÷ 345] x 100 = -97.39%
Formula
Percentage change = [(9 - 345) / 345] x 100
Subtract the new number by the original number
9 - 345 = -336
-336 ÷ 345 = -0.9739130434782609
-0.9739130434782609 x 100 = -97.39%