-47.96% is the change from 638 to 332
Calculation steps:
[( 332 - 638 ) ÷ 638] x 100 = -47.96%
Formula
Percentage change = [(332 - 638) / 638] x 100
Subtract the new number by the original number
332 - 638 = -306
-306 ÷ 638 = -0.47962382445141066
-0.47962382445141066 x 100 = -47.96%