-56.2% is the change from 637 to 279
Calculation steps:
[( 279 - 637 ) ÷ 637] x 100 = -56.2%
Formula
Percentage change = [(279 - 637) / 637] x 100
Subtract the new number by the original number
279 - 637 = -358
-358 ÷ 637 = -0.5620094191522763
-0.5620094191522763 x 100 = -56.2%