-6.45% is the change from 155 to 145
Calculation steps:
[( 145 - 155 ) ÷ 155] x 100 = -6.45%
Formula
Percentage change = [(145 - 155) / 155] x 100
Subtract the new number by the original number
145 - 155 = -10
-10 ÷ 155 = -0.06451612903225806
-0.06451612903225806 x 100 = -6.45%