-49.18% is the change from 612 to 311
Calculation steps:
[( 311 - 612 ) ÷ 612] x 100 = -49.18%
Formula
Percentage change = [(311 - 612) / 612] x 100
Subtract the new number by the original number
311 - 612 = -301
-301 ÷ 612 = -0.4918300653594771
-0.4918300653594771 x 100 = -49.18%