-66.45% is the change from 918 to 308
Calculation steps:
[( 308 - 918 ) ÷ 918] x 100 = -66.45%
Formula
Percentage change = [(308 - 918) / 918] x 100
Subtract the new number by the original number
308 - 918 = -610
-610 ÷ 918 = -0.664488017429194
-0.664488017429194 x 100 = -66.45%