-39.93% is the change from 879 to 528
Calculation steps:
[( 528 - 879 ) ÷ 879] x 100 = -39.93%
Formula
Percentage change = [(528 - 879) / 879] x 100
Subtract the new number by the original number
528 - 879 = -351
-351 ÷ 879 = -0.3993174061433447
-0.3993174061433447 x 100 = -39.93%