-85.12% is the change from 121 to 18
Calculation steps:
[( 18 - 121 ) ÷ 121] x 100 = -85.12%
Formula
Percentage change = [(18 - 121) / 121] x 100
Subtract the new number by the original number
18 - 121 = -103
-103 ÷ 121 = -0.8512396694214877
-0.8512396694214877 x 100 = -85.12%