-98.16% is the change from 651 to 12
Calculation steps:
[( 12 - 651 ) ÷ 651] x 100 = -98.16%
Formula
Percentage change = [(12 - 651) / 651] x 100
Subtract the new number by the original number
12 - 651 = -639
-639 ÷ 651 = -0.9815668202764977
-0.9815668202764977 x 100 = -98.16%