-99.71% is the change from 347 to 1
Calculation steps:
[( 1 - 347 ) ÷ 347] x 100 = -99.71%
Formula
Percentage change = [(1 - 347) / 347] x 100
Subtract the new number by the original number
1 - 347 = -346
-346 ÷ 347 = -0.9971181556195965
-0.9971181556195965 x 100 = -99.71%