-90.14% is the change from 71 to 7
Calculation steps:
[( 7 - 71 ) ÷ 71] x 100 = -90.14%
Formula
Percentage change = [(7 - 71) / 71] x 100
Subtract the new number by the original number
7 - 71 = -64
-64 ÷ 71 = -0.9014084507042254
-0.9014084507042254 x 100 = -90.14%