-91.18% is the change from 102 to 9
Calculation steps:
[( 9 - 102 ) ÷ 102] x 100 = -91.18%
Formula
Percentage change = [(9 - 102) / 102] x 100
Subtract the new number by the original number
9 - 102 = -93
-93 ÷ 102 = -0.9117647058823529
-0.9117647058823529 x 100 = -91.18%