-40% is the change from 155 to 93
Calculation steps:
[( 93 - 155 ) ÷ 155] x 100 = -40%
Formula
Percentage change = [(93 - 155) / 155] x 100
Subtract the new number by the original number
93 - 155 = -62
-62 ÷ 155 = -0.4
-0.4 x 100 = -40%
Example