-48.89% is the change from 45 to 23
Calculation steps:
[( 23 - 45 ) ÷ 45] x 100 = -48.89%
Formula
Percentage change = [(23 - 45) / 45] x 100
Subtract the new number by the original number
23 - 45 = -22
-22 ÷ 45 = -0.4888888888888889
-0.4888888888888889 x 100 = -48.89%