-86.4% is the change from 890 to 121
Calculation steps:
[( 121 - 890 ) ÷ 890] x 100 = -86.4%
Formula
Percentage change = [(121 - 890) / 890] x 100
Subtract the new number by the original number
121 - 890 = -769
-769 ÷ 890 = -0.8640449438202247
-0.8640449438202247 x 100 = -86.4%