-99.7% is the change from 335 to 1
Calculation steps:
[( 1 - 335 ) ÷ 335] x 100 = -99.7%
Formula
Percentage change = [(1 - 335) / 335] x 100
Subtract the new number by the original number
1 - 335 = -334
-334 ÷ 335 = -0.9970149253731343
-0.9970149253731343 x 100 = -99.7%