-87.32% is the change from 71 to 9
Calculation steps:
[( 9 - 71 ) ÷ 71] x 100 = -87.32%
Formula
Percentage change = [(9 - 71) / 71] x 100
Subtract the new number by the original number
9 - 71 = -62
-62 ÷ 71 = -0.8732394366197183
-0.8732394366197183 x 100 = -87.32%