-98.3% is the change from 648 to 11
Calculation steps:
[( 11 - 648 ) ÷ 648] x 100 = -98.3%
Formula
Percentage change = [(11 - 648) / 648] x 100
Subtract the new number by the original number
11 - 648 = -637
-637 ÷ 648 = -0.9830246913580247
-0.9830246913580247 x 100 = -98.3%