-10.97% is the change from 155 to 138
Calculation steps:
[( 138 - 155 ) ÷ 155] x 100 = -10.97%
Formula
Percentage change = [(138 - 155) / 155] x 100
Subtract the new number by the original number
138 - 155 = -17
-17 ÷ 155 = -0.10967741935483871
-0.10967741935483871 x 100 = -10.97%