-50.08% is the change from 651 to 325
Calculation steps:
[( 325 - 651 ) ÷ 651] x 100 = -50.08%
Formula
Percentage change = [(325 - 651) / 651] x 100
Subtract the new number by the original number
325 - 651 = -326
-326 ÷ 651 = -0.500768049155146
-0.500768049155146 x 100 = -50.08%