-99.71% is the change from 349 to 1
Calculation steps:
[( 1 - 349 ) ÷ 349] x 100 = -99.71%
Formula
Percentage change = [(1 - 349) / 349] x 100
Subtract the new number by the original number
1 - 349 = -348
-348 ÷ 349 = -0.997134670487106
-0.997134670487106 x 100 = -99.71%