-0.5% is the change from 997 to 992
Calculation steps:
[( 992 - 997 ) ÷ 997] x 100 = -0.5%
Formula
Percentage change = [(992 - 997) / 997] x 100
Subtract the new number by the original number
992 - 997 = -5
-5 ÷ 997 = -0.0050150451354062184
-0.0050150451354062184 x 100 = -0.5%