-62.99% is the change from 870 to 322
Calculation steps:
[( 322 - 870 ) ÷ 870] x 100 = -62.99%
Formula
Percentage change = [(322 - 870) / 870] x 100
Subtract the new number by the original number
322 - 870 = -548
-548 ÷ 870 = -0.6298850574712643
-0.6298850574712643 x 100 = -62.99%