-95.09% is the change from 611 to 30
Calculation steps:
[( 30 - 611 ) ÷ 611] x 100 = -95.09%
Formula
Percentage change = [(30 - 611) / 611] x 100
Subtract the new number by the original number
30 - 611 = -581
-581 ÷ 611 = -0.9509001636661211
-0.9509001636661211 x 100 = -95.09%