-31.59% is the change from 918 to 628
Calculation steps:
[( 628 - 918 ) ÷ 918] x 100 = -31.59%
Formula
Percentage change = [(628 - 918) / 918] x 100
Subtract the new number by the original number
628 - 918 = -290
-290 ÷ 918 = -0.3159041394335512
-0.3159041394335512 x 100 = -31.59%