-66.18% is the change from 618 to 209
Calculation steps:
[( 209 - 618 ) ÷ 618] x 100 = -66.18%
Formula
Percentage change = [(209 - 618) / 618] x 100
Subtract the new number by the original number
209 - 618 = -409
-409 ÷ 618 = -0.6618122977346278
-0.6618122977346278 x 100 = -66.18%