-69.25% is the change from 878 to 270
Calculation steps:
[( 270 - 878 ) ÷ 878] x 100 = -69.25%
Formula
Percentage change = [(270 - 878) / 878] x 100
Subtract the new number by the original number
270 - 878 = -608
-608 ÷ 878 = -0.6924829157175398
-0.6924829157175398 x 100 = -69.25%