-43.36% is the change from 971 to 550
Calculation steps:
[( 550 - 971 ) ÷ 971] x 100 = -43.36%
Formula
Percentage change = [(550 - 971) / 971] x 100
Subtract the new number by the original number
550 - 971 = -421
-421 ÷ 971 = -0.43357363542739447
-0.43357363542739447 x 100 = -43.36%