-31.17% is the change from 940 to 647
Calculation steps:
[( 647 - 940 ) ÷ 940] x 100 = -31.17%
Formula
Percentage change = [(647 - 940) / 940] x 100
Subtract the new number by the original number
647 - 940 = -293
-293 ÷ 940 = -0.31170212765957445
-0.31170212765957445 x 100 = -31.17%