-97.66% is the change from 342 to 8
Calculation steps:
[( 8 - 342 ) ÷ 342] x 100 = -97.66%
Formula
Percentage change = [(8 - 342) / 342] x 100
Subtract the new number by the original number
8 - 342 = -334
-334 ÷ 342 = -0.9766081871345029
-0.9766081871345029 x 100 = -97.66%