-2.74% is the change from 73 to 71
Calculation steps:
[( 71 - 73 ) ÷ 73] x 100 = -2.74%
Formula
Percentage change = [(71 - 73) / 73] x 100
Subtract the new number by the original number
71 - 73 = -2
-2 ÷ 73 = -0.0273972602739726
-0.0273972602739726 x 100 = -2.74%