-82.1% is the change from 676 to 121
Calculation steps:
[( 121 - 676 ) ÷ 676] x 100 = -82.1%
Formula
Percentage change = [(121 - 676) / 676] x 100
Subtract the new number by the original number
121 - 676 = -555
-555 ÷ 676 = -0.8210059171597633
-0.8210059171597633 x 100 = -82.1%