-3.27% is the change from 918 to 888
Calculation steps:
[( 888 - 918 ) ÷ 918] x 100 = -3.27%
Formula
Percentage change = [(888 - 918) / 918] x 100
Subtract the new number by the original number
888 - 918 = -30
-30 ÷ 918 = -0.032679738562091505
-0.032679738562091505 x 100 = -3.27%