-21.92% is the change from 990 to 773
Calculation steps:
[( 773 - 990 ) ÷ 990] x 100 = -21.92%
Formula
Percentage change = [(773 - 990) / 990] x 100
Subtract the new number by the original number
773 - 990 = -217
-217 ÷ 990 = -0.2191919191919192
-0.2191919191919192 x 100 = -21.92%