-18% is the change from 878 to 720
Calculation steps:
[( 720 - 878 ) ÷ 878] x 100 = -18%
Formula
Percentage change = [(720 - 878) / 878] x 100
Subtract the new number by the original number
720 - 878 = -158
-158 ÷ 878 = -0.17995444191343962
-0.17995444191343962 x 100 = -18%