-88.79% is the change from 660 to 74
Calculation steps:
[( 74 - 660 ) ÷ 660] x 100 = -88.79%
Formula
Percentage change = [(74 - 660) / 660] x 100
Subtract the new number by the original number
74 - 660 = -586
-586 ÷ 660 = -0.8878787878787879
-0.8878787878787879 x 100 = -88.79%