-61.28% is the change from 878 to 340
Calculation steps:
[( 340 - 878 ) ÷ 878] x 100 = -61.28%
Formula
Percentage change = [(340 - 878) / 878] x 100
Subtract the new number by the original number
340 - 878 = -538
-538 ÷ 878 = -0.6127562642369021
-0.6127562642369021 x 100 = -61.28%