-97.48% is the change from 991 to 25
Calculation steps:
[( 25 - 991 ) ÷ 991] x 100 = -97.48%
Formula
Percentage change = [(25 - 991) / 991] x 100
Subtract the new number by the original number
25 - 991 = -966
-966 ÷ 991 = -0.9747729566094854
-0.9747729566094854 x 100 = -97.48%