-33.13% is the change from 990 to 662
Calculation steps:
[( 662 - 990 ) ÷ 990] x 100 = -33.13%
Formula
Percentage change = [(662 - 990) / 990] x 100
Subtract the new number by the original number
662 - 990 = -328
-328 ÷ 990 = -0.33131313131313134
-0.33131313131313134 x 100 = -33.13%