-20.59% is the change from 918 to 729
Calculation steps:
[( 729 - 918 ) ÷ 918] x 100 = -20.59%
Formula
Percentage change = [(729 - 918) / 918] x 100
Subtract the new number by the original number
729 - 918 = -189
-189 ÷ 918 = -0.20588235294117646
-0.20588235294117646 x 100 = -20.59%