-33.61% is the change from 967 to 642
Calculation steps:
[( 642 - 967 ) ÷ 967] x 100 = -33.61%
Formula
Percentage change = [(642 - 967) / 967] x 100
Subtract the new number by the original number
642 - 967 = -325
-325 ÷ 967 = -0.3360910031023785
-0.3360910031023785 x 100 = -33.61%