-75.44% is the change from 342 to 84
Calculation steps:
[( 84 - 342 ) ÷ 342] x 100 = -75.44%
Formula
Percentage change = [(84 - 342) / 342] x 100
Subtract the new number by the original number
84 - 342 = -258
-258 ÷ 342 = -0.7543859649122807
-0.7543859649122807 x 100 = -75.44%