-33.09% is the change from 967 to 647
Calculation steps:
[( 647 - 967 ) ÷ 967] x 100 = -33.09%
Formula
Percentage change = [(647 - 967) / 967] x 100
Subtract the new number by the original number
647 - 967 = -320
-320 ÷ 967 = -0.3309203722854188
-0.3309203722854188 x 100 = -33.09%