-49.43% is the change from 971 to 491
Calculation steps:
[( 491 - 971 ) ÷ 971] x 100 = -49.43%
Formula
Percentage change = [(491 - 971) / 971] x 100
Subtract the new number by the original number
491 - 971 = -480
-480 ÷ 971 = -0.49433573635427397
-0.49433573635427397 x 100 = -49.43%