-77.98% is the change from 990 to 218
Calculation steps:
[( 218 - 990 ) ÷ 990] x 100 = -77.98%
Formula
Percentage change = [(218 - 990) / 990] x 100
Subtract the new number by the original number
218 - 990 = -772
-772 ÷ 990 = -0.7797979797979798
-0.7797979797979798 x 100 = -77.98%