-42.65% is the change from 959 to 550
Calculation steps:
[( 550 - 959 ) ÷ 959] x 100 = -42.65%
Formula
Percentage change = [(550 - 959) / 959] x 100
Subtract the new number by the original number
550 - 959 = -409
-409 ÷ 959 = -0.4264859228362878
-0.4264859228362878 x 100 = -42.65%