-99.29% is the change from 991 to 7
Calculation steps:
[( 7 - 991 ) ÷ 991] x 100 = -99.29%
Formula
Percentage change = [(7 - 991) / 991] x 100
Subtract the new number by the original number
7 - 991 = -984
-984 ÷ 991 = -0.992936427850656
-0.992936427850656 x 100 = -99.29%