-50% is the change from 46 to 23
Calculation steps:
[( 23 - 46 ) ÷ 46] x 100 = -50%
Formula
Percentage change = [(23 - 46) / 46] x 100
Subtract the new number by the original number
23 - 46 = -23
-23 ÷ 46 = -0.5
-0.5 x 100 = -50%
Example