-30.3% is the change from 990 to 690
Calculation steps:
[( 690 - 990 ) ÷ 990] x 100 = -30.3%
Formula
Percentage change = [(690 - 990) / 990] x 100
Subtract the new number by the original number
690 - 990 = -300
-300 ÷ 990 = -0.30303030303030304
-0.30303030303030304 x 100 = -30.3%