-31.32% is the change from 942 to 647
Calculation steps:
[( 647 - 942 ) ÷ 942] x 100 = -31.32%
Formula
Percentage change = [(647 - 942) / 942] x 100
Subtract the new number by the original number
647 - 942 = -295
-295 ÷ 942 = -0.31316348195329086
-0.31316348195329086 x 100 = -31.32%