-55.07% is the change from 345 to 155
Calculation steps:
[( 155 - 345 ) ÷ 345] x 100 = -55.07%
Formula
Percentage change = [(155 - 345) / 345] x 100
Subtract the new number by the original number
155 - 345 = -190
-190 ÷ 345 = -0.5507246376811594
-0.5507246376811594 x 100 = -55.07%