-4.63% is the change from 648 to 618
Calculation steps:
[( 618 - 648 ) ÷ 648] x 100 = -4.63%
Formula
Percentage change = [(618 - 648) / 648] x 100
Subtract the new number by the original number
618 - 648 = -30
-30 ÷ 648 = -0.046296296296296294
-0.046296296296296294 x 100 = -4.63%