-31.6% is the change from 981 to 671
Calculation steps:
[( 671 - 981 ) ÷ 981] x 100 = -31.6%
Formula
Percentage change = [(671 - 981) / 981] x 100
Subtract the new number by the original number
671 - 981 = -310
-310 ÷ 981 = -0.3160040774719674
-0.3160040774719674 x 100 = -31.6%