-60.23% is the change from 342 to 136
Calculation steps:
[( 136 - 342 ) ÷ 342] x 100 = -60.23%
Formula
Percentage change = [(136 - 342) / 342] x 100
Subtract the new number by the original number
136 - 342 = -206
-206 ÷ 342 = -0.6023391812865497
-0.6023391812865497 x 100 = -60.23%