-91.75% is the change from 618 to 51
Calculation steps:
[( 51 - 618 ) ÷ 618] x 100 = -91.75%
Formula
Percentage change = [(51 - 618) / 618] x 100
Subtract the new number by the original number
51 - 618 = -567
-567 ÷ 618 = -0.9174757281553398
-0.9174757281553398 x 100 = -91.75%