-98.85% is the change from 610 to 7
Calculation steps:
[( 7 - 610 ) ÷ 610] x 100 = -98.85%
Formula
Percentage change = [(7 - 610) / 610] x 100
Subtract the new number by the original number
7 - 610 = -603
-603 ÷ 610 = -0.9885245901639345
-0.9885245901639345 x 100 = -98.85%