-31.26% is the change from 918 to 631
Calculation steps:
[( 631 - 918 ) ÷ 918] x 100 = -31.26%
Formula
Percentage change = [(631 - 918) / 918] x 100
Subtract the new number by the original number
631 - 918 = -287
-287 ÷ 918 = -0.31263616557734203
-0.31263616557734203 x 100 = -31.26%