-55.17% is the change from 638 to 286
Calculation steps:
[( 286 - 638 ) ÷ 638] x 100 = -55.17%
Formula
Percentage change = [(286 - 638) / 638] x 100
Subtract the new number by the original number
286 - 638 = -352
-352 ÷ 638 = -0.5517241379310345
-0.5517241379310345 x 100 = -55.17%