-69.7% is the change from 990 to 300
Calculation steps:
[( 300 - 990 ) ÷ 990] x 100 = -69.7%
Formula
Percentage change = [(300 - 990) / 990] x 100
Subtract the new number by the original number
300 - 990 = -690
-690 ÷ 990 = -0.696969696969697
-0.696969696969697 x 100 = -69.7%