-77.47% is the change from 990 to 223
Calculation steps:
[( 223 - 990 ) ÷ 990] x 100 = -77.47%
Formula
Percentage change = [(223 - 990) / 990] x 100
Subtract the new number by the original number
223 - 990 = -767
-767 ÷ 990 = -0.7747474747474747
-0.7747474747474747 x 100 = -77.47%