-31.37% is the change from 918 to 630
Calculation steps:
[( 630 - 918 ) ÷ 918] x 100 = -31.37%
Formula
Percentage change = [(630 - 918) / 918] x 100
Subtract the new number by the original number
630 - 918 = -288
-288 ÷ 918 = -0.3137254901960784
-0.3137254901960784 x 100 = -31.37%