-33.3% is the change from 997 to 665
Calculation steps:
[( 665 - 997 ) ÷ 997] x 100 = -33.3%
Formula
Percentage change = [(665 - 997) / 997] x 100
Subtract the new number by the original number
665 - 997 = -332
-332 ÷ 997 = -0.3329989969909729
-0.3329989969909729 x 100 = -33.3%