-43.3% is the change from 970 to 550
Calculation steps:
[( 550 - 970 ) ÷ 970] x 100 = -43.3%
Formula
Percentage change = [(550 - 970) / 970] x 100
Subtract the new number by the original number
550 - 970 = -420
-420 ÷ 970 = -0.4329896907216495
-0.4329896907216495 x 100 = -43.3%