-49.76% is the change from 617 to 310
Calculation steps:
[( 310 - 617 ) ÷ 617] x 100 = -49.76%
Formula
Percentage change = [(310 - 617) / 617] x 100
Subtract the new number by the original number
310 - 617 = -307
-307 ÷ 617 = -0.49756888168557534
-0.49756888168557534 x 100 = -49.76%