-51.61% is the change from 155 to 75
Calculation steps:
[( 75 - 155 ) ÷ 155] x 100 = -51.61%
Formula
Percentage change = [(75 - 155) / 155] x 100
Subtract the new number by the original number
75 - 155 = -80
-80 ÷ 155 = -0.5161290322580645
-0.5161290322580645 x 100 = -51.61%