-53.8% is the change from 342 to 158
Calculation steps:
[( 158 - 342 ) ÷ 342] x 100 = -53.8%
Formula
Percentage change = [(158 - 342) / 342] x 100
Subtract the new number by the original number
158 - 342 = -184
-184 ÷ 342 = -0.5380116959064327
-0.5380116959064327 x 100 = -53.8%