-29.85% is the change from 918 to 644
Calculation steps:
[( 644 - 918 ) ÷ 918] x 100 = -29.85%
Formula
Percentage change = [(644 - 918) / 918] x 100
Subtract the new number by the original number
644 - 918 = -274
-274 ÷ 918 = -0.2984749455337691
-0.2984749455337691 x 100 = -29.85%