-49.11% is the change from 619 to 315
Calculation steps:
[( 315 - 619 ) ÷ 619] x 100 = -49.11%
Formula
Percentage change = [(315 - 619) / 619] x 100
Subtract the new number by the original number
315 - 619 = -304
-304 ÷ 619 = -0.4911147011308562
-0.4911147011308562 x 100 = -49.11%