-49.85% is the change from 971 to 487
Calculation steps:
[( 487 - 971 ) ÷ 971] x 100 = -49.85%
Formula
Percentage change = [(487 - 971) / 971] x 100
Subtract the new number by the original number
487 - 971 = -484
-484 ÷ 971 = -0.4984552008238929
-0.4984552008238929 x 100 = -49.85%