-49.76% is the change from 619 to 311
Calculation steps:
[( 311 - 619 ) ÷ 619] x 100 = -49.76%
Formula
Percentage change = [(311 - 619) / 619] x 100
Subtract the new number by the original number
311 - 619 = -308
-308 ÷ 619 = -0.4975767366720517
-0.4975767366720517 x 100 = -49.76%