-33.4% is the change from 967 to 644
Calculation steps:
[( 644 - 967 ) ÷ 967] x 100 = -33.4%
Formula
Percentage change = [(644 - 967) / 967] x 100
Subtract the new number by the original number
644 - 967 = -323
-323 ÷ 967 = -0.3340227507755946
-0.3340227507755946 x 100 = -33.4%