-37.07% is the change from 839 to 528
Calculation steps:
[( 528 - 839 ) ÷ 839] x 100 = -37.07%
Formula
Percentage change = [(528 - 839) / 839] x 100
Subtract the new number by the original number
528 - 839 = -311
-311 ÷ 839 = -0.3706793802145411
-0.3706793802145411 x 100 = -37.07%