-86.57% is the change from 67 to 9
Calculation steps:
[( 9 - 67 ) ÷ 67] x 100 = -86.57%
Formula
Percentage change = [(9 - 67) / 67] x 100
Subtract the new number by the original number
9 - 67 = -58
-58 ÷ 67 = -0.8656716417910447
-0.8656716417910447 x 100 = -86.57%