-54.09% is the change from 342 to 157
Calculation steps:
[( 157 - 342 ) ÷ 342] x 100 = -54.09%
Formula
Percentage change = [(157 - 342) / 342] x 100
Subtract the new number by the original number
157 - 342 = -185
-185 ÷ 342 = -0.5409356725146199
-0.5409356725146199 x 100 = -54.09%