-33.74% is the change from 990 to 656
Calculation steps:
[( 656 - 990 ) ÷ 990] x 100 = -33.74%
Formula
Percentage change = [(656 - 990) / 990] x 100
Subtract the new number by the original number
656 - 990 = -334
-334 ÷ 990 = -0.3373737373737374
-0.3373737373737374 x 100 = -33.74%