-99.71% is the change from 339 to 1
Calculation steps:
[( 1 - 339 ) ÷ 339] x 100 = -99.71%
Formula
Percentage change = [(1 - 339) / 339] x 100
Subtract the new number by the original number
1 - 339 = -338
-338 ÷ 339 = -0.9970501474926253
-0.9970501474926253 x 100 = -99.71%