-85.95% is the change from 121 to 17
Calculation steps:
[( 17 - 121 ) ÷ 121] x 100 = -85.95%
Formula
Percentage change = [(17 - 121) / 121] x 100
Subtract the new number by the original number
17 - 121 = -104
-104 ÷ 121 = -0.859504132231405
-0.859504132231405 x 100 = -85.95%