-92.65% is the change from 830 to 61
Calculation steps:
[( 61 - 830 ) ÷ 830] x 100 = -92.65%
Formula
Percentage change = [(61 - 830) / 830] x 100
Subtract the new number by the original number
61 - 830 = -769
-769 ÷ 830 = -0.9265060240963855
-0.9265060240963855 x 100 = -92.65%