-31.19% is the change from 997 to 686
Calculation steps:
[( 686 - 997 ) ÷ 997] x 100 = -31.19%
Formula
Percentage change = [(686 - 997) / 997] x 100
Subtract the new number by the original number
686 - 997 = -311
-311 ÷ 997 = -0.3119358074222668
-0.3119358074222668 x 100 = -31.19%