-97.38% is the change from 343 to 9
Calculation steps:
[( 9 - 343 ) ÷ 343] x 100 = -97.38%
Formula
Percentage change = [(9 - 343) / 343] x 100
Subtract the new number by the original number
9 - 343 = -334
-334 ÷ 343 = -0.9737609329446064
-0.9737609329446064 x 100 = -97.38%