-98.63% is the change from 73 to 1
Calculation steps:
[( 1 - 73 ) ÷ 73] x 100 = -98.63%
Formula
Percentage change = [(1 - 73) / 73] x 100
Subtract the new number by the original number
1 - 73 = -72
-72 ÷ 73 = -0.9863013698630136
-0.9863013698630136 x 100 = -98.63%