-59.77% is the change from 870 to 350
Calculation steps:
[( 350 - 870 ) ÷ 870] x 100 = -59.77%
Formula
Percentage change = [(350 - 870) / 870] x 100
Subtract the new number by the original number
350 - 870 = -520
-520 ÷ 870 = -0.5977011494252874
-0.5977011494252874 x 100 = -59.77%