-68.51% is the change from 870 to 274
Calculation steps:
[( 274 - 870 ) ÷ 870] x 100 = -68.51%
Formula
Percentage change = [(274 - 870) / 870] x 100
Subtract the new number by the original number
274 - 870 = -596
-596 ÷ 870 = -0.6850574712643678
-0.6850574712643678 x 100 = -68.51%