-52.15% is the change from 650 to 311
Calculation steps:
[( 311 - 650 ) ÷ 650] x 100 = -52.15%
Formula
Percentage change = [(311 - 650) / 650] x 100
Subtract the new number by the original number
311 - 650 = -339
-339 ÷ 650 = -0.5215384615384615
-0.5215384615384615 x 100 = -52.15%