-54.2% is the change from 345 to 158
Calculation steps:
[( 158 - 345 ) ÷ 345] x 100 = -54.2%
Formula
Percentage change = [(158 - 345) / 345] x 100
Subtract the new number by the original number
158 - 345 = -187
-187 ÷ 345 = -0.5420289855072464
-0.5420289855072464 x 100 = -54.2%