-71.56% is the change from 545 to 155
Calculation steps:
[( 155 - 545 ) ÷ 545] x 100 = -71.56%
Formula
Percentage change = [(155 - 545) / 545] x 100
Subtract the new number by the original number
155 - 545 = -390
-390 ÷ 545 = -0.7155963302752294
-0.7155963302752294 x 100 = -71.56%