-49.95% is the change from 971 to 486
Calculation steps:
[( 486 - 971 ) ÷ 971] x 100 = -49.95%
Formula
Percentage change = [(486 - 971) / 971] x 100
Subtract the new number by the original number
486 - 971 = -485
-485 ÷ 971 = -0.49948506694129763
-0.49948506694129763 x 100 = -49.95%