-92.12% is the change from 990 to 78
Calculation steps:
[( 78 - 990 ) ÷ 990] x 100 = -92.12%
Formula
Percentage change = [(78 - 990) / 990] x 100
Subtract the new number by the original number
78 - 990 = -912
-912 ÷ 990 = -0.9212121212121213
-0.9212121212121213 x 100 = -92.12%