-49.23% is the change from 971 to 493
Calculation steps:
[( 493 - 971 ) ÷ 971] x 100 = -49.23%
Formula
Percentage change = [(493 - 971) / 971] x 100
Subtract the new number by the original number
493 - 971 = -478
-478 ÷ 971 = -0.4922760041194645
-0.4922760041194645 x 100 = -49.23%