-87.8% is the change from 992 to 121
Calculation steps:
[( 121 - 992 ) ÷ 992] x 100 = -87.8%
Formula
Percentage change = [(121 - 992) / 992] x 100
Subtract the new number by the original number
121 - 992 = -871
-871 ÷ 992 = -0.8780241935483871
-0.8780241935483871 x 100 = -87.8%