-49.92% is the change from 651 to 326
Calculation steps:
[( 326 - 651 ) ÷ 651] x 100 = -49.92%
Formula
Percentage change = [(326 - 651) / 651] x 100
Subtract the new number by the original number
326 - 651 = -325
-325 ÷ 651 = -0.49923195084485406
-0.49923195084485406 x 100 = -49.92%