-87.22% is the change from 618 to 79
Calculation steps:
[( 79 - 618 ) ÷ 618] x 100 = -87.22%
Formula
Percentage change = [(79 - 618) / 618] x 100
Subtract the new number by the original number
79 - 618 = -539
-539 ÷ 618 = -0.872168284789644
-0.872168284789644 x 100 = -87.22%