-91.09% is the change from 685 to 61
Calculation steps:
[( 61 - 685 ) ÷ 685] x 100 = -91.09%
Formula
Percentage change = [(61 - 685) / 685] x 100
Subtract the new number by the original number
61 - 685 = -624
-624 ÷ 685 = -0.910948905109489
-0.910948905109489 x 100 = -91.09%