-76.9% is the change from 342 to 79
Calculation steps:
[( 79 - 342 ) ÷ 342] x 100 = -76.9%
Formula
Percentage change = [(79 - 342) / 342] x 100
Subtract the new number by the original number
79 - 342 = -263
-263 ÷ 342 = -0.7690058479532164
-0.7690058479532164 x 100 = -76.9%