-0.7% is the change from 998 to 991
Calculation steps:
[( 991 - 998 ) ÷ 998] x 100 = -0.7%
Formula
Percentage change = [(991 - 998) / 998] x 100
Subtract the new number by the original number
991 - 998 = -7
-7 ÷ 998 = -0.0070140280561122245
-0.0070140280561122245 x 100 = -0.7%