-56.1% is the change from 123 to 54
Calculation steps:
[( 54 - 123 ) ÷ 123] x 100 = -56.1%
Formula
Percentage change = [(54 - 123) / 123] x 100
Subtract the new number by the original number
54 - 123 = -69
-69 ÷ 123 = -0.5609756097560976
-0.5609756097560976 x 100 = -56.1%