-30.14% is the change from 73 to 51
Calculation steps:
[( 51 - 73 ) ÷ 73] x 100 = -30.14%
Formula
Percentage change = [(51 - 73) / 73] x 100
Subtract the new number by the original number
51 - 73 = -22
-22 ÷ 73 = -0.3013698630136986
-0.3013698630136986 x 100 = -30.14%