-82.19% is the change from 73 to 13
Calculation steps:
[( 13 - 73 ) ÷ 73] x 100 = -82.19%
Formula
Percentage change = [(13 - 73) / 73] x 100
Subtract the new number by the original number
13 - 73 = -60
-60 ÷ 73 = -0.821917808219178
-0.821917808219178 x 100 = -82.19%