-96.06% is the change from 991 to 39
Calculation steps:
[( 39 - 991 ) ÷ 991] x 100 = -96.06%
Formula
Percentage change = [(39 - 991) / 991] x 100
Subtract the new number by the original number
39 - 991 = -952
-952 ÷ 991 = -0.9606458123107972
-0.9606458123107972 x 100 = -96.06%