-48.61% is the change from 971 to 499
Calculation steps:
[( 499 - 971 ) ÷ 971] x 100 = -48.61%
Formula
Percentage change = [(499 - 971) / 971] x 100
Subtract the new number by the original number
499 - 971 = -472
-472 ÷ 971 = -0.486096807415036
-0.486096807415036 x 100 = -48.61%