-99.12% is the change from 342 to 3
Calculation steps:
[( 3 - 342 ) ÷ 342] x 100 = -99.12%
Formula
Percentage change = [(3 - 342) / 342] x 100
Subtract the new number by the original number
3 - 342 = -339
-339 ÷ 342 = -0.9912280701754386
-0.9912280701754386 x 100 = -99.12%