-37.66% is the change from 839 to 523
Calculation steps:
[( 523 - 839 ) ÷ 839] x 100 = -37.66%
Formula
Percentage change = [(523 - 839) / 839] x 100
Subtract the new number by the original number
523 - 839 = -316
-316 ÷ 839 = -0.3766388557806913
-0.3766388557806913 x 100 = -37.66%