-68.49% is the change from 73 to 23
Calculation steps:
[( 23 - 73 ) ÷ 73] x 100 = -68.49%
Formula
Percentage change = [(23 - 73) / 73] x 100
Subtract the new number by the original number
23 - 73 = -50
-50 ÷ 73 = -0.684931506849315
-0.684931506849315 x 100 = -68.49%