-31.63% is the change from 942 to 644
Calculation steps:
[( 644 - 942 ) ÷ 942] x 100 = -31.63%
Formula
Percentage change = [(644 - 942) / 942] x 100
Subtract the new number by the original number
644 - 942 = -298
-298 ÷ 942 = -0.31634819532908703
-0.31634819532908703 x 100 = -31.63%