-37.78% is the change from 839 to 522
Calculation steps:
[( 522 - 839 ) ÷ 839] x 100 = -37.78%
Formula
Percentage change = [(522 - 839) / 839] x 100
Subtract the new number by the original number
522 - 839 = -317
-317 ÷ 839 = -0.3778307508939213
-0.3778307508939213 x 100 = -37.78%