-61.15% is the change from 870 to 338
Calculation steps:
[( 338 - 870 ) ÷ 870] x 100 = -61.15%
Formula
Percentage change = [(338 - 870) / 870] x 100
Subtract the new number by the original number
338 - 870 = -532
-532 ÷ 870 = -0.6114942528735632
-0.6114942528735632 x 100 = -61.15%