-83.08% is the change from 839 to 142
Calculation steps:
[( 142 - 839 ) ÷ 839] x 100 = -83.08%
Formula
Percentage change = [(142 - 839) / 839] x 100
Subtract the new number by the original number
142 - 839 = -697
-697 ÷ 839 = -0.8307508939213349
-0.8307508939213349 x 100 = -83.08%