-32.63% is the change from 990 to 667
Calculation steps:
[( 667 - 990 ) ÷ 990] x 100 = -32.63%
Formula
Percentage change = [(667 - 990) / 990] x 100
Subtract the new number by the original number
667 - 990 = -323
-323 ÷ 990 = -0.32626262626262625
-0.32626262626262625 x 100 = -32.63%