-31.08% is the change from 991 to 683
Calculation steps:
[( 683 - 991 ) ÷ 991] x 100 = -31.08%
Formula
Percentage change = [(683 - 991) / 991] x 100
Subtract the new number by the original number
683 - 991 = -308
-308 ÷ 991 = -0.31079717457114026
-0.31079717457114026 x 100 = -31.08%