-66.97% is the change from 990 to 327
Calculation steps:
[( 327 - 990 ) ÷ 990] x 100 = -66.97%
Formula
Percentage change = [(327 - 990) / 990] x 100
Subtract the new number by the original number
327 - 990 = -663
-663 ÷ 990 = -0.6696969696969697
-0.6696969696969697 x 100 = -66.97%