-40.09% is the change from 651 to 390
Calculation steps:
[( 390 - 651 ) ÷ 651] x 100 = -40.09%
Formula
Percentage change = [(390 - 651) / 651] x 100
Subtract the new number by the original number
390 - 651 = -261
-261 ÷ 651 = -0.4009216589861751
-0.4009216589861751 x 100 = -40.09%