-99.13% is the change from 343 to 3
Calculation steps:
[( 3 - 343 ) ÷ 343] x 100 = -99.13%
Formula
Percentage change = [(3 - 343) / 343] x 100
Subtract the new number by the original number
3 - 343 = -340
-340 ÷ 343 = -0.9912536443148688
-0.9912536443148688 x 100 = -99.13%