-56.51% is the change from 637 to 277
Calculation steps:
[( 277 - 637 ) ÷ 637] x 100 = -56.51%
Formula
Percentage change = [(277 - 637) / 637] x 100
Subtract the new number by the original number
277 - 637 = -360
-360 ÷ 637 = -0.565149136577708
-0.565149136577708 x 100 = -56.51%