-39.7% is the change from 879 to 530
Calculation steps:
[( 530 - 879 ) ÷ 879] x 100 = -39.7%
Formula
Percentage change = [(530 - 879) / 879] x 100
Subtract the new number by the original number
530 - 879 = -349
-349 ÷ 879 = -0.3970420932878271
-0.3970420932878271 x 100 = -39.7%