-81.41% is the change from 651 to 121
Calculation steps:
[( 121 - 651 ) ÷ 651] x 100 = -81.41%
Formula
Percentage change = [(121 - 651) / 651] x 100
Subtract the new number by the original number
121 - 651 = -530
-530 ÷ 651 = -0.8141321044546851
-0.8141321044546851 x 100 = -81.41%