-97.95% is the change from 342 to 7
Calculation steps:
[( 7 - 342 ) ÷ 342] x 100 = -97.95%
Formula
Percentage change = [(7 - 342) / 342] x 100
Subtract the new number by the original number
7 - 342 = -335
-335 ÷ 342 = -0.97953216374269
-0.97953216374269 x 100 = -97.95%