-6.93% is the change from 664 to 618
Calculation steps:
[( 618 - 664 ) ÷ 664] x 100 = -6.93%
Formula
Percentage change = [(618 - 664) / 664] x 100
Subtract the new number by the original number
618 - 664 = -46
-46 ÷ 664 = -0.06927710843373494
-0.06927710843373494 x 100 = -6.93%