-38.56% is the change from 651 to 400
Calculation steps:
[( 400 - 651 ) ÷ 651] x 100 = -38.56%
Formula
Percentage change = [(400 - 651) / 651] x 100
Subtract the new number by the original number
400 - 651 = -251
-251 ÷ 651 = -0.38556067588325654
-0.38556067588325654 x 100 = -38.56%