-32.53% is the change from 959 to 647
Calculation steps:
[( 647 - 959 ) ÷ 959] x 100 = -32.53%
Formula
Percentage change = [(647 - 959) / 959] x 100
Subtract the new number by the original number
647 - 959 = -312
-312 ÷ 959 = -0.32533889468196037
-0.32533889468196037 x 100 = -32.53%