-66.8% is the change from 988 to 328
Calculation steps:
[( 328 - 988 ) ÷ 988] x 100 = -66.8%
Formula
Percentage change = [(328 - 988) / 988] x 100
Subtract the new number by the original number
328 - 988 = -660
-660 ÷ 988 = -0.6680161943319838
-0.6680161943319838 x 100 = -66.8%