-6.79% is the change from 663 to 618
Calculation steps:
[( 618 - 663 ) ÷ 663] x 100 = -6.79%
Formula
Percentage change = [(618 - 663) / 663] x 100
Subtract the new number by the original number
618 - 663 = -45
-45 ÷ 663 = -0.06787330316742081
-0.06787330316742081 x 100 = -6.79%