-41.8% is the change from 945 to 550
Calculation steps:
[( 550 - 945 ) ÷ 945] x 100 = -41.8%
Formula
Percentage change = [(550 - 945) / 945] x 100
Subtract the new number by the original number
550 - 945 = -395
-395 ÷ 945 = -0.41798941798941797
-0.41798941798941797 x 100 = -41.8%