-36.13% is the change from 155 to 99
Calculation steps:
[( 99 - 155 ) ÷ 155] x 100 = -36.13%
Formula
Percentage change = [(99 - 155) / 155] x 100
Subtract the new number by the original number
99 - 155 = -56
-56 ÷ 155 = -0.36129032258064514
-0.36129032258064514 x 100 = -36.13%