-51.75% is the change from 342 to 165
Calculation steps:
[( 165 - 342 ) ÷ 342] x 100 = -51.75%
Formula
Percentage change = [(165 - 342) / 342] x 100
Subtract the new number by the original number
165 - 342 = -177
-177 ÷ 342 = -0.5175438596491229
-0.5175438596491229 x 100 = -51.75%