-49.2% is the change from 624 to 317
Calculation steps:
[( 317 - 624 ) ÷ 624] x 100 = -49.2%
Formula
Percentage change = [(317 - 624) / 624] x 100
Subtract the new number by the original number
317 - 624 = -307
-307 ÷ 624 = -0.49198717948717946
-0.49198717948717946 x 100 = -49.2%