-52.46% is the change from 650 to 309
Calculation steps:
[( 309 - 650 ) ÷ 650] x 100 = -52.46%
Formula
Percentage change = [(309 - 650) / 650] x 100
Subtract the new number by the original number
309 - 650 = -341
-341 ÷ 650 = -0.5246153846153846
-0.5246153846153846 x 100 = -52.46%