-31.8% is the change from 981 to 669
Calculation steps:
[( 669 - 981 ) ÷ 981] x 100 = -31.8%
Formula
Percentage change = [(669 - 981) / 981] x 100
Subtract the new number by the original number
669 - 981 = -312
-312 ÷ 981 = -0.3180428134556575
-0.3180428134556575 x 100 = -31.8%