-86.78% is the change from 121 to 16
Calculation steps:
[( 16 - 121 ) ÷ 121] x 100 = -86.78%
Formula
Percentage change = [(16 - 121) / 121] x 100
Subtract the new number by the original number
16 - 121 = -105
-105 ÷ 121 = -0.8677685950413223
-0.8677685950413223 x 100 = -86.78%