-49.76% is the change from 635 to 319
Calculation steps:
[( 319 - 635 ) ÷ 635] x 100 = -49.76%
Formula
Percentage change = [(319 - 635) / 635] x 100
Subtract the new number by the original number
319 - 635 = -316
-316 ÷ 635 = -0.49763779527559054
-0.49763779527559054 x 100 = -49.76%