-93.48% is the change from 138 to 9
Calculation steps:
[( 9 - 138 ) ÷ 138] x 100 = -93.48%
Formula
Percentage change = [(9 - 138) / 138] x 100
Subtract the new number by the original number
9 - 138 = -129
-129 ÷ 138 = -0.9347826086956522
-0.9347826086956522 x 100 = -93.48%