-36.06% is the change from 990 to 633
Calculation steps:
[( 633 - 990 ) ÷ 990] x 100 = -36.06%
Formula
Percentage change = [(633 - 990) / 990] x 100
Subtract the new number by the original number
633 - 990 = -357
-357 ÷ 990 = -0.3606060606060606
-0.3606060606060606 x 100 = -36.06%