-42.63% is the change from 638 to 366
Calculation steps:
[( 366 - 638 ) ÷ 638] x 100 = -42.63%
Formula
Percentage change = [(366 - 638) / 638] x 100
Subtract the new number by the original number
366 - 638 = -272
-272 ÷ 638 = -0.4263322884012539
-0.4263322884012539 x 100 = -42.63%