-56.68% is the change from 644 to 279
Calculation steps:
[( 279 - 644 ) ÷ 644] x 100 = -56.68%
Formula
Percentage change = [(279 - 644) / 644] x 100
Subtract the new number by the original number
279 - 644 = -365
-365 ÷ 644 = -0.5667701863354038
-0.5667701863354038 x 100 = -56.68%