-66.12% is the change from 918 to 311
Calculation steps:
[( 311 - 918 ) ÷ 918] x 100 = -66.12%
Formula
Percentage change = [(311 - 918) / 918] x 100
Subtract the new number by the original number
311 - 918 = -607
-607 ÷ 918 = -0.6612200435729847
-0.6612200435729847 x 100 = -66.12%