-48.2% is the change from 612 to 317
Calculation steps:
[( 317 - 612 ) ÷ 612] x 100 = -48.2%
Formula
Percentage change = [(317 - 612) / 612] x 100
Subtract the new number by the original number
317 - 612 = -295
-295 ÷ 612 = -0.4820261437908497
-0.4820261437908497 x 100 = -48.2%